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Fix uart_init(), use correct AF for UART1/UART2

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cpq committed 2023-01-19 10:31:26 +00:00
1 parent 280be2eaea
commit 556bf7b888
1 file changed
+5 -5
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examples/stm32/nucleo-f429zi-baremetal/mcu.h
+5 -5
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@@ -106,7 +106,7 @@ static inline int gpio_read(uint16_t pin) {
}
static inline void gpio_write(uint16_t pin, bool val) {
struct gpio *gpio = gpio_bank(pin);
gpio->BSRR |= BIT(PINNO(pin)) << (val ? 0 : 16);
gpio->BSRR = BIT(PINNO(pin)) << (val ? 0 : 16);
}
static inline void gpio_init(uint16_t pin, uint8_t mode, uint8_t type,
uint8_t speed, uint8_t pull, uint8_t af) {
@@ -161,16 +161,16 @@ struct uart {
static inline void uart_init(struct uart *uart, unsigned long baud) {
// https://www.st.com/resource/en/datasheet/stm32f429zi.pdf
uint8_t af = 0; // Alternate function
uint8_t af = 7; // Alternate function
uint16_t rx = 0, tx = 0; // pins
if (uart == UART1) RCC->APB2ENR |= BIT(4);
if (uart == UART2) RCC->APB1ENR |= BIT(17);
if (uart == UART3) RCC->APB1ENR |= BIT(18);
if (uart == UART1) af = 4, tx = PIN('A', 9), rx = PIN('A', 10);
if (uart == UART2) af = 4, tx = PIN('A', 2), rx = PIN('A', 3);
if (uart == UART3) af = 7, tx = PIN('D', 8), rx = PIN('D', 9);
if (uart == UART1) tx = PIN('A', 9), rx = PIN('A', 10);
if (uart == UART2) tx = PIN('A', 2), rx = PIN('A', 3);
if (uart == UART3) tx = PIN('D', 8), rx = PIN('D', 9);
gpio_init(tx, GPIO_MODE_AF, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_HIGH, 0, af);
gpio_init(rx, GPIO_MODE_AF, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_HIGH, 0, af);