#include "PCA9555.h"
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uint8_t pca9555writedata_config[10];//ÔÝ´æ¼Ä´æÆ÷ËùÓÐÅäÖõÄÊý×é
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uint8_t pca9555writedata_output[10];
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void IIC_gpio_pca_init(void)
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{
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io_pin_mux_set(SDA_PIN, IO_FUNC0);
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io_pin_mux_set(SCL_PIN, IO_FUNC0);
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gpio_pin_set_dir(SDA_PIN , GPIO_DIR_OUT, 1);
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// io_open_drain_set(SDA_PIN, 1);
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io_pull_set(SDA_PIN , IO_PULL_UP, IO_PULL_UP_LEVEL2);//Êä³ö¸ß×è̬
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gpio_pin_set_dir(SCL_PIN , GPIO_DIR_OUT, 1);
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//io_open_drain_set(SCL_PIN, 1);
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io_pull_set(SCL_PIN , IO_HIGH_Z, IO_PULL_UP_NONE);
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}
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void IIC2_pca_Start(void)
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{
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// IIC2_SDA_OUT(); //sdaÏßÊä³ö
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SDA_1;
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delay_us(10);
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SCL_1;
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delay_us(10);
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SDA_0;//START:when CLK is high,DATA change form high to low
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delay_us(10);
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}
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void IIC_pca_Ready(void)
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{
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SCL_1;
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delay_us(10);
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SDA_1;
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delay_us(10);
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}
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//²úÉúIICÍ£Ö¹ÐźÅ
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void IIC2_pca_Stop(void)
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{
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SDA_0;//STOP:when CLK is high DATA change form low to high
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delay_us(10);
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SCL_1;
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delay_us(10);
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SDA_1;//·¢ËÍI2C×ÜÏß½áÊøÐźÅ
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delay_us(10);
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}
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//µÈ´ýÓ¦´ðÐźŵ½À´
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//·µ»ØÖµ£º1£¬½ÓÊÕÓ¦´ðʧ°Ü
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// 0£¬½ÓÊÕÓ¦´ð³É¹¦
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uint8_t IIC2_Wait_pca_Ack(void)
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{
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uint8_t ucErrTime=0;
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// IIC2_SDA_IN();
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gpio_pin_set_dir(SDA_PIN , GPIO_DIR_IN, 1); //SDAÉèÖÃΪÊäÈëµÈ´ý½ÓÊն˵ÄÓ¦´ðÐźÅ
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SDA_1;
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delay_us(6);
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SCL_1;
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delay_us(6);
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while(IIC2_READ_SDA)
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{
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ucErrTime++;
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if(ucErrTime>250)
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{
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IIC2_pca_Stop();
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return 1;
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}
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}
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gpio_pin_set_dir(SDA_PIN , GPIO_DIR_OUT, 1);
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SCL_0;//ʱÖÓÊä³ö0
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return 0;
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}
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//²úÉúACKÓ¦´ð
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void IIC2_pca_send_Ack(void)
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{
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SDA_0;
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delay_us(10);
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SCL_1;//¶ÁÈ¡SDAµçƽΪµÍÔòÓÐÓ¦´ð
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delay_us(10);
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SCL_0;
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}
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//²»²úÉúACKÓ¦´ð
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void IIC2_pca_send_NAck(void)
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{
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SDA_1;
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delay_us(10);
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SCL_1;//¶ÁÈ¡SDAµçƽΪ¸ßÔòÎÞÓ¦´ðÐźÅ
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delay_us(10);
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SCL_0;
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}
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//IIC·¢ËÍÒ»¸ö×Ö½Ú,WRITE
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//·µ»Ø´Ó»úÓÐÎÞÓ¦´ð
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//1£¬ÓÐÓ¦´ð
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//0£¬ÎÞÓ¦´ð
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void IIC2_Send_pca_Byte(uint8_t txd)
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{
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uint8_t t;
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// IIC2_SDA_OUT();
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SCL_0;//ÀµÍʱÖÓ¿ªÊ¼Êý¾Ý´«Êä
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for(t=0; t<8; t++)
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{
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if((txd&0x80)>>7)
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{
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SDA_1;
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}
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else
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{
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SDA_0;
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}
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txd <<= 1;
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delay_us(10);
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SCL_1;
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delay_us(10);
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SCL_0;
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delay_us(10);
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}
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SDA_1;//ÐÂÔösdaÀ¸ß
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delay_us(10);
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}
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//¶Á1¸ö×Ö½Ú£¬ack=1ʱ£¬·¢ËÍACK£¬ack=0£¬·¢ËÍnACK,²»ÊÇÒ»ÑùµÄ
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uint8_t IIC2_Read_pca_Byte(unsigned char ack)
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{
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unsigned char i,receive=0;
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// IIC2_SDA_IN();//SDAÉèÖÃΪÊäÈë
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for(i=0; i<8; i++ )
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{
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SCL_0;
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delay_us(10);
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SCL_1;
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receive<<=1;
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if(IIC2_READ_SDA)receive++;
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delay_us(5);
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}
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if (!ack)
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IIC2_pca_send_NAck();//·¢ËÍnACK
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else
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IIC2_pca_send_Ack(); //·¢ËÍACK
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return receive;
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}
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/*********************************************************
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//дpca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼²»ÆÆ»µ×îµ×²ãÇý¶¯
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addr оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
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low_byte дÈëоƬµÄÇ°°ËλÊý¾Ý
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high_byte дÈëоƬµÄÇ°ºóλÊý¾Ý
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*********************************************************/
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//дpca9555µÚÒ»²ã£¬×îµ×²ãÇý¶¯
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void IIC_Write_Pca9555(unsigned char addr,unsigned char reg_addr,unsigned char low_byte,unsigned char high_byte)
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{
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IIC2_pca_Start();
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IIC2_Send_pca_Byte(addr & 0xfe);
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IIC2_Wait_pca_Ack();
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IIC2_Send_pca_Byte(reg_addr);
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IIC2_Wait_pca_Ack();
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IIC2_Send_pca_Byte(low_byte);
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IIC2_Wait_pca_Ack();
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IIC2_Send_pca_Byte(high_byte);
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IIC2_Wait_pca_Ack();
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IIC2_pca_Stop();
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}
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void IIC_Read_Pca9555(uint8_t addr,uint8_t reg_addr,uint8_t* pBuffer,uint16_t num)
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{
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IIC2_pca_Start();
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IIC2_Send_pca_Byte(addr & 0xfe);
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IIC2_Wait_pca_Ack();
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IIC2_Send_pca_Byte(reg_addr);
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IIC2_Wait_pca_Ack();
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IIC2_pca_Start();
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IIC2_Send_pca_Byte(addr | 0x01);
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IIC2_Wait_pca_Ack();
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while (num)
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{
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*pBuffer = IIC2_Read_pca_Byte(1);
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if (num == 1)
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{
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IIC2_pca_send_NAck();
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}
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else
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{
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IIC2_pca_send_Ack();
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}
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pBuffer++;
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num--;
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}
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IIC2_pca_Stop();
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}
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/*дpca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼²»ÆÆ»µ×îµ×²ãÇý¶¯,¸Ãº¯ÊýĬÈÏÅäÖÃÊä³ö¼Ä´æÆ÷
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addr оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
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data_L дÈëоƬµÄÇ°°ËλÊý¾Ý
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data_H дÈëоƬµÄÇ°ºóλÊý¾Ý
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*/
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void PCA9555_write_output_port_data(unsigned char addr,unsigned char data_L,unsigned char data_H)
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{
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IIC_Write_Pca9555(addr,PCA9555_REG_OUT0,data_L,data_H);// PCA9555_REG_OUT0 Êä³ö¼Ä´æÆ÷0µØÖ·
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pca9555writedata_output[0]= data_L;//±£´æ¸Ã´ÎÉèÖÃÊý¾Ý
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pca9555writedata_output[0]= data_H;
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}
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/*дpca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼²»ÆÆ»µ×îµ×²ãÇý¶¯,¸Ãº¯ÊýĬÈÏÅäÖÃÊä³ö¼Ä´æÆ÷
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addr оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
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data_L дÈëоƬµÄÇ°°ËλÊý¾Ý
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data_H дÈëоƬµÄÇ°ºóλÊý¾Ý
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*/
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void PCA9555_write_config_port_data(unsigned char addr,unsigned char data_L,unsigned char data_H)
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{
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IIC_Write_Pca9555(addr,PCA9555_REG_CFG0,data_L,data_H);// PCA9555_REG_OUT0 Êä³ö¼Ä´æÆ÷0µØÖ·
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pca9555writedata_config[0]= data_L;//±£´æ¸Ã´ÎÉèÖÃÊý¾Ý
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pca9555writedata_config[0]= data_H;
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}
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/*¶Ápca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼²»ÆÆ»µ×îµ×²ãÇý¶¯
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addr оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
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pBuffer ¶Á³öоƬµÄÊý¾Ý 2¸ö¼Ä´æÆ÷µÄgpioµçƽ
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*/
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void PCA9555_readdata(unsigned char addr,unsigned char* pBuffer)
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{
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IIC_Read_Pca9555(addr,PCA9555_REG_IN0,pBuffer,2);//2Ϊ¶Á³öоƬÊý¾Ý×éÊý£¬9555Ϊ2×é,È«²¿¶Á³ö
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}
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///*ÅäÖÃоƬµÄ¶ÔÓ¦¹Ü½ÅÊäÈëÊä³ö¹¦ÄÜ
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// addr оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
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// data_L дÈëоƬµÄÇ°°ËλÊý¾Ý 1¸ß×迹ÊäÈë 0Êä³ö ÊäÈë¼Ä´æÆ÷ĬÈÏÉÏÀ
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// data_H дÈëоƬµÄÇ°ºóλÊý¾Ý
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//*/
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//void PCA9555_config_gpio(unsigned char addr,unsigned char data_L,unsigned char data_H)
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//{
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// IIC_Write_Pca9555(addr,PCA9555_REG_CFG0,data_L,data_H);// PCA9555_REG_OUT0 Êä³ö¼Ä´æÆ÷0µØÖ·
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//}
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/*ÉèÖÃËùÓÐÊä³ö
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value ¿ØÖƵÄIOÊä³ö״̬ 0£ºÈ«²¿Êä³öµÍ 1£ºÈ«²¿Êä³ö¸ß
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½öÏÞÊä³öģʽ
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*/
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void PCA9555_Set_All_Output(unsigned char value)
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{
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int i;
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for(i=0;i<4;i++){
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if(value==0)
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pca9555writedata_output[i]=0;
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else
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pca9555writedata_output[i]=0xff;
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}
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PCA9555_write_output_port_data(PCA9555_DEVICE_ADDR,pca9555writedata_output[0],pca9555writedata_output[1]);//È«²¿Êä³öΪ1»ò0
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//¶àоƬ
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//PCA9555_writedata(PCA9555_REG_OUT0,pca9555writedata[2],pca9555writedata[3]);
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}
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/*ÉèÖõÚÒ»¸öоƬijһͨµÀIO¸ßµÍÊä³ö½öÏÞÊä³ö
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num ¿ØÖƵÄIOÐòºÅ 1~16
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value ¿ØÖƵÄIOÊä³ö״̬ 0£ºµÍµçƽ 1£º¸ßµçƽ
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*/
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void PCA9555_Set_One_Value_Output(unsigned char num,unsigned char value)
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{
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if(num >0 && num <17){//µÚÒ»¸öоƬIO1-16¿ØÖÆ
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if(num <9){
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if(value)pca9555writedata_output[0] |= 0x01<<(num - 1);//¸³ÖµÎ»¸ß
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else pca9555writedata_output[0] &= ~(0x01<<(num - 1));//¸³ÖµÎ»µÍ
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}
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else{
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if(value)pca9555writedata_output[1] |= 0x01<<(num - 9);//¸³ÖµÎ»¸ß
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else pca9555writedata_output[1] &= ~(0x01<<(num - 9));//¸³ÖµÎ»µÍ
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}
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PCA9555_write_output_port_data(PCA9555_DEVICE_ADDR,pca9555writedata_output[0],pca9555writedata_output[1]);
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}else{//³¬³öоƬ¿ØÖÆ
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//error
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}
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//µ×ÏÂΪ¶àоƬÂß¼
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// else if(num >16 && num <33){//µÚ¶þ¸öоƬIO1-16¿ØÖÆ£¬Ê¹Óøü¶àIOÒÔ´ËÀàÍÆ£¬×î¶àÖ§³Ö0x000~0x111 ¹²8¸öоƬ´®Áª£¬¹²128¸öIO£¬Èç¹û²»¹»¿ÉÒÔʹÓÃPCA9505£¬40¸öIO£¬×î¶à´®Áª320¸öIO
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// if(num <25){
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// if(value)pca9555writedata[2] |= 0x01<<(num - 17);//¸³ÖµÎ»¸ß
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// else pca9555writedata[2] &= ~(0x01<<(num - 17));//¸³ÖµÎ»µÍ
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// }
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// else{
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// if(value)pca9555writedata[3] |= 0x01<<(num - 25);//¸³ÖµÎ»¸ß
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// else pca9555writedata[3] &= ~(0x01<<(num - 25));//¸³ÖµÎ»µÍ
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// }
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// PCA9555_writedata(PCA9555_REG_OUT1,pca9555writedata[2],pca9555writedata[3]);
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// }
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// else{//³¬³öоƬ¿ØÖÆ
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// //error
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// }
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}
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/*ÉèÖõÚÒ»¸öоƬijһͨµÀIOÊäÈë»òÊä³ö
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num ¿ØÖƵÄIOÐòºÅ 1~17
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value ¿ØÖƵÄIOÊä³ö״̬ 0£ºµÍµçƽ 1£º¸ßµçƽ
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*/
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void PCA9555_Set_One_Value_Config(unsigned char num,unsigned char value)
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{
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if(num >0 && num <17){//µÚÒ»¸öоƬIO1-16¿ØÖÆ
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if(num <9){
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if(value)pca9555writedata_config[0] |= 0x01<<(num - 1);//¸³ÖµÎ»¸ß
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else pca9555writedata_config[0] &= ~(0x01<<(num - 1));//¸³ÖµÎ»µÍ
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}
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else{
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if(value)pca9555writedata_config[1] |= 0x01<<(num - 9);//¸³ÖµÎ»¸ß
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else pca9555writedata_config[1] &= ~(0x01<<(num - 9));//¸³ÖµÎ»µÍ
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}
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PCA9555_write_config_port_data(PCA9555_DEVICE_ADDR,pca9555writedata_config[0],pca9555writedata_config[1]);
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}else{//³¬³öоƬ¿ØÖÆ
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//error
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}
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}
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void PCA9555_init()
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{
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IIC_gpio_pca_init();//ÅäÖÃIIC¹Ü½Å
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PCA9555_write_config_port_data(PCA9555_DEVICE_ADDR,0x00,0x00);//È«ÅäÖÃΪÊä³ö
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//²âÊÔ
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PCA9555_Set_All_Output(1);//È«²¿À¸ß
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}
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