Add usart.{h, c}

2025-01-01 12:30:57 +01:00
parent 992b3c5b97
commit 95455a7161
18 changed files with 9159 additions and 478 deletions
--- a/src/gpio.h
+++ b/src/gpio.h
@@ -17,6 +17,10 @@ struct gpio {
  volatile uint32_t AFRH;     // Alternative function high register
 };

+// AFRH, AFRL registers
+#define GPIO_AF_USART2_RX (0b0111) // Alternative function 7 (AF7)
+#define GPIO_AF_USART2_TX (0b0111) // Alternative function 7 (AF7)
+
 #define GPIO_BASE_ADDR (0x40020000U)
 #define GPIO_PORT_OFFSET (0x400U)
 #define GPIO(port) ((struct gpio*)(uintptr_t)(GPIO_BASE_ADDR + (GPIO_PORT_OFFSET * port)))