From d7cedc11df3a790c8b8830c89b0bd69088a0e51d Mon Sep 17 00:00:00 2001
From: WXK <287788329@qq.com>
Date: 星期三, 21 五月 2025 09:43:54 +0800
Subject: [PATCH] 3.7，放开加速计接口，可以修改
---
FML/GPS.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 49 insertions(+), 2 deletions(-)
diff --git a/FML/GPS.c b/FML/GPS.c
index 1587545..bd68186 100644
--- a/FML/GPS.c
+++ b/FML/GPS.c
@@ -480,7 +480,48 @@
uint8_t GPS_ParseGGA_changdu;
extern uint16_t g_com_map[256];
extern uint8_t bat_percent;
+static HIDO_UINT8 l_u8PosState = 0;
uint8_t gpsbaoxu;
+// 仅校验GNGGA数据是否有效（格式+校验和）
+// 返回值：1=有效，0=无效
+uint16_t error1,error2,error3,error4;
+uint8_t validate_gngga(const char *nmea_data)
+{
+ // 基本格式检查 ---------------------------------------------------
+ // 检查起始符和最小长度
+ if (nmea_data[0] != '$' || strlen(nmea_data) < 10) {
+ error1++;
+ return 0;
+ }
+
+ // 检查是否为GNGGA语句
+ if (strncmp(nmea_data+1, "GNGGA", 5) != 0) {
+ error2++;
+ return 0;
+ }
+
+ // 校验和检查 -----------------------------------------------------
+ const char *asterisk = strchr(nmea_data, '*');
+ if (!asterisk || (asterisk - nmea_data) > 100) {
+ error3++;
+ return 0; // 找不到*号或位置异常
+ }
+
+ // 提取接收到的校验和（2位十六进制）
+ uint8_t received_checksum;
+ if (sscanf(asterisk+1, "%02hhx", &received_checksum) != 1) {
+ error4++;
+ return 0; // 校验和格式错误
+ }
+
+ // 计算校验和：从$后的第一个字符到*前的所有字符异或
+ uint8_t calculated_checksum = 0;
+ for (const char *p = nmea_data+1; p < asterisk; p++) {
+ calculated_checksum ^= *p;
+ }
+
+ return (calculated_checksum == received_checksum);
+}
static HIDO_INT32 GPS_ParseGGA(HIDO_CHAR *_pcData, HIDO_UINT32 _u32Len)
{
uint16_t state_flag;
@@ -488,6 +529,7 @@
HIDO_DataStruct stPosState;
jinru_parsegga_flag=1;
memset(&stGPS, 0, sizeof(ST_GPS));
+ memset(GPS_ParseGGA_data,0,GPS_ParseGGA_changdu);
if (GPS_DataCheck(_pcData, _u32Len) != HIDO_OK)
{
return HIDO_ERR;
@@ -497,7 +539,12 @@
{
return HIDO_ERR;
}
- if(*(HIDO_CHAR *)stPosState.m_pData != '0')
+// if (!validate_gngga((const char *)_pcData))
+// {
+// return HIDO_ERR;
+// }
+ l_u8PosState = atoi((HIDO_CHAR *)stPosState.m_pData);
+ if(l_u8PosState)
{
// HIDO_DebugString(_pcData, _u32Len);
if(l_fnGPSEventCallback != NULL)
@@ -833,7 +880,7 @@
ST_UartInit stInit;
- stInit.m_eRxMode = UART_RX_MODE_INT;
+ stInit.m_eRxMode = UART_RX_MODE_DMA;
stInit.m_eTxMode = UART_TX_MODE_POLL;
stInit.m_pu8RxBuf = l_au8GPSUartRxBuf;
stInit.m_u32RxBufSize = GPS_UART_RX_BUF_SIZE;
--
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