mirror of
https://github.com/EranMorkon/AMTS.git
synced 2023-12-28 16:48:38 +00:00
133 lines
3.2 KiB
C
133 lines
3.2 KiB
C
#include "io.h"
|
|
|
|
uint8_t i2c1_inited = 0;
|
|
uint8_t usart1_inited = 0;
|
|
uint8_t usart3_inited = 0;
|
|
|
|
void i2c1_init(void)
|
|
{
|
|
// If I2C1 is already inited, do nothing
|
|
if (i2c1_inited == 1) {
|
|
return;
|
|
}
|
|
|
|
// Enable GPIOB and I2C1 clocks
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
|
|
|
|
// Create gpio struct and fill default values
|
|
GPIO_InitTypeDef gpio;
|
|
GPIO_StructInit(&gpio);
|
|
|
|
// Set PB6 to alternate function push pull (SCL)
|
|
gpio.GPIO_Mode = GPIO_Mode_AF_PP;
|
|
gpio.GPIO_Pin = GPIO_Pin_6;
|
|
GPIO_Init(GPIOB, &gpio);
|
|
|
|
// Set PB7 to alternate function open drain (SDA)
|
|
gpio.GPIO_Mode = GPIO_Mode_AF_OD;
|
|
gpio.GPIO_Pin = GPIO_Pin_7;
|
|
GPIO_Init(GPIOB, &gpio);
|
|
|
|
// Set I2C1 clock to 400 kHz
|
|
I2C_InitTypeDef i2c;
|
|
I2C_StructInit(&i2c);
|
|
i2c.I2C_ClockSpeed = 400000;
|
|
I2C_Init(I2C1, &i2c);
|
|
|
|
// Enable I2C1
|
|
I2C_Cmd(I2C1, ENABLE);
|
|
i2c1_inited = 1;
|
|
}
|
|
|
|
void usart1_init(void)
|
|
{
|
|
// If USART1 is inited, do nothing
|
|
if (usart1_inited == 1) {
|
|
return;
|
|
}
|
|
|
|
// Enable GPIOA and USART1 clocks
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
|
|
|
|
// Create gpio struct and fill default values
|
|
GPIO_InitTypeDef gpio;
|
|
GPIO_StructInit(&gpio);
|
|
|
|
// Set PA9 to alternate function push pull (TxD)
|
|
gpio.GPIO_Mode = GPIO_Mode_AF_PP;
|
|
gpio.GPIO_Pin = GPIO_Pin_9;
|
|
GPIO_Init(GPIOA, &gpio);
|
|
|
|
// Set PA10 to input floating (RxD)
|
|
gpio.GPIO_Mode = GPIO_Mode_IN_FLOATING;
|
|
gpio.GPIO_Pin = GPIO_Pin_10;
|
|
GPIO_Init(GPIOA, &gpio);
|
|
|
|
// Set USART1 clock to 115 200 baud
|
|
USART_InitTypeDef usart;
|
|
USART_StructInit(&usart);
|
|
usart.USART_BaudRate = 115200;
|
|
USART_Init(USART1, &usart);
|
|
|
|
// Init USART1 clocks
|
|
USART_ClockInitTypeDef usartclock;
|
|
USART_ClockStructInit(&usartclock);
|
|
USART_ClockInit(USART1, &usartclock);
|
|
|
|
// Enable USART1
|
|
USART_Cmd(USART1, ENABLE);
|
|
usart1_inited = 1;
|
|
}
|
|
|
|
void usart3_init(void)
|
|
{
|
|
// If USART3 is inited, do nothing
|
|
if (usart3_inited == 1) {
|
|
return;
|
|
}
|
|
|
|
// Enable GPIOB and USART3 clocks
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
|
|
|
|
// Create gpio struct and fill default values
|
|
GPIO_InitTypeDef gpio;
|
|
GPIO_StructInit(&gpio);
|
|
|
|
// Set PB10 to alternate function push pull (TxD)
|
|
gpio.GPIO_Mode = GPIO_Mode_AF_PP;
|
|
gpio.GPIO_Pin = GPIO_Pin_10;
|
|
GPIO_Init(GPIOB, &gpio);
|
|
|
|
// Set PB11 to input floating (RxD)
|
|
gpio.GPIO_Mode = GPIO_Mode_IN_FLOATING;
|
|
gpio.GPIO_Pin = GPIO_Pin_11;
|
|
GPIO_Init(GPIOB, &gpio);
|
|
|
|
// Set USART3 clock to 115 200 baud
|
|
USART_InitTypeDef usart;
|
|
USART_StructInit(&usart);
|
|
usart.USART_BaudRate = 115200;
|
|
USART_Init(USART3, &usart);
|
|
|
|
// Init USART3 clocks
|
|
USART_ClockInitTypeDef usartclock;
|
|
USART_ClockStructInit(&usartclock);
|
|
USART_ClockInit(USART3, &usartclock);
|
|
|
|
// Enable USART3
|
|
USART_Cmd(USART3, ENABLE);
|
|
usart3_inited = 1;
|
|
}
|
|
|
|
void USART_SendString(USART_TypeDef *USARTx, char *str)
|
|
{
|
|
// Send a string, byte by byte over the specified USART
|
|
while (*str) {
|
|
while (USART_GetFlagStatus(USARTx, USART_FLAG_TXE) == RESET);
|
|
USART_SendData(USARTx, *str++);
|
|
}
|
|
}
|