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This commit is contained in:
Andreas Mieke 2018-04-03 17:18:28 +02:00
parent d109bae8d7
commit 9a18bd88f0
22 changed files with 286 additions and 122 deletions
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18
Mieke/SW/MT/esp.c
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@ -2,29 +2,36 @@
void init_esp(void)
{
// Enable GPIOa and USART2 clocks
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
// Create gpio struct and fill it with default values
GPIO_InitTypeDef gpio;
GPIO_StructInit(&gpio);
// Set PB2 to alternate function push pull (Tx)
gpio.GPIO_Mode = GPIO_Mode_AF_PP;
gpio.GPIO_Pin = GPIO_Pin_2;
GPIO_Init(GPIOA, &gpio);
// Set PB3 to input floating (Rx)
gpio.GPIO_Mode = GPIO_Mode_IN_FLOATING;
gpio.GPIO_Pin = GPIO_Pin_3;
GPIO_Init(GPIOA, &gpio);
// Create usart struct and init USART2 to 115 200 baud
USART_InitTypeDef usart;
USART_StructInit(&usart);
usart.USART_BaudRate = 115200;
USART_Init(USART2, &usart);
// Init USART2 clock
USART_ClockInitTypeDef usartclock;
USART_ClockStructInit(&usartclock);
USART_ClockInit(USART2, &usartclock);
// Init NVIC for USART2 RXNE to see stuff sent to the TCP server. The ISR is in main.c
NVIC_InitTypeDef nvic;
nvic.NVIC_IRQChannel = USART2_IRQn;
nvic.NVIC_IRQChannelCmd = ENABLE;
@ -33,11 +40,13 @@ void init_esp(void)
NVIC_Init(&nvic);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
// Enable USART2
USART_Cmd(USART2, ENABLE);
}
void esp_wait()
{
// Wait some time so the ESP can execute the commands sent
int i, j;
for(j=0;j<500;j++) {
for(i=0;i<65536;i++);
@ -45,6 +54,7 @@ void esp_wait()
}
void send_str(char *str) {
// Sends a string over UART
while(*str) {
while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
USART_SendData(USART2, *str++);
@ -53,23 +63,31 @@ void send_str(char *str) {
void run_esp(void)
{
// Restore the ESP to defaults, then wait
send_str("AT+RESTORE\r\n");
esp_wait();
// Print out the current mode
send_str("AT+CWMODE?\r\n");
esp_wait();
// Set mode to access point
send_str("AT+CWMODE=2\r\n");
esp_wait();
// Reset
send_str("AT+RST\r\n");
esp_wait();
// Enable access point
send_str("AT+CIPMUX=1\r\n");
esp_wait();
// Start TCP server on port 2526
send_str("AT+CIPSERVER=1,2526\r\n");
esp_wait();
// Print out the current IP address
send_str("AT+CIPAP_CUR?\r\n");
}
void deinit_esp(void)
{
// Disable the interrupt, then disable USART2
USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
USART_Cmd(USART2, DISABLE);
USART_DeInit(USART2);