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add modbus RTU

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This commit is contained in:
Edward Emelianov
2024-09-24 18:13:23 +03:00
parent 22a205001a
commit 03772fce3a
9 changed files with 83 additions and 26 deletions
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2
F1:F103/FX3U/usart.c
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@@ -104,7 +104,7 @@ void usart_setup(uint32_t speed){
// PA9 - Tx, PA10 - Rx
RCC->APB2ENR |= RCC_APB2ENR_USART1EN;
RCC->AHBENR |= RCC_AHBENR_DMA1EN;
GPIOA->CRH = (GPIOA->CRH & ~(CRH(9,0xf)|CRH(10,0xf))) |
GPIOA->CRH = (GPIOA->CRH & ~(CRH(9, 0xf)|CRH(10, 0xf))) |
CRH(9, CNF_AFPP|MODE_NORMAL) | CRH(10, CNF_FLINPUT|MODE_INPUT);
// USART1 Tx DMA - Channel4 (Rx - channel 5)
DMA1_Channel4->CPAR = (uint32_t) &USART1->DR; // periph