From 0336357cf8d72c0c17c6fed3d5233f1e352e32ae Mon Sep 17 00:00:00 2001 From: zhyinch <zhyinch@gmail.com> Date: 星期三, 16 二月 2022 19:57:40 +0800 Subject: [PATCH] 修改485控制BUG --- 源码/核心板/Src/OnChipDevices/Usart.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git "a/\346\272\220\347\240\201/\346\240\270\345\277\203\346\235\277/Src/OnChipDevices/Usart.c" "b/\346\272\220\347\240\201/\346\240\270\345\277\203\346\235\277/Src/OnChipDevices/Usart.c" index cb7716c..234c307 100644 --- "a/\346\272\220\347\240\201/\346\240\270\345\277\203\346\235\277/Src/OnChipDevices/Usart.c" +++ "b/\346\272\220\347\240\201/\346\240\270\345\277\203\346\235\277/Src/OnChipDevices/Usart.c" @@ -333,7 +333,7 @@ } // */ #else - /* + //检查是否数据帧需要发送 void UART_CheckSend(void) { @@ -361,10 +361,12 @@ if(m_EUART_TxFrm_Head == m_EUART_TxFrm_Tail) { m_bEUARTCheckingSend = 0; + OUT485_DISABLE; return; } //开启一次数据发送 + OUT485_ENABLE; EUART_TX_DMA_CH->CMAR = (uint32_t)m_EUART_TxFrames[m_EUART_TxFrm_Tail].buf; //要发送的内存地址 EUART_TX_DMA_CH->CNDTR = m_EUART_TxFrames[m_EUART_TxFrm_Tail].len; //要发送的字节数 EUART_TX_DMA_CH->CCR |= 0x01; //开启一次DMA @@ -399,6 +401,7 @@ m_EUART_TxFrm_Head = 0; m_EUART_TxFrm_FreeFrmLen--; m_bEUARTPushingFrms = 0; + UART_CheckSend(); } //将最新一帧数据Pop出队列 -- Gitblit v1.9.3