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wiced: baud rate change basically working

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This commit is contained in:
Matthias Ringwald 2016-01-03 21:45:24 +01:00
parent 9d6d69d659
commit 138cb18a2a
1 changed files with 18 additions and 13 deletions
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31
platform/wiced/hci_transport_h4_wiced.c
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@ -180,12 +180,15 @@ static wiced_result_t h4_tx_worker_send_packet(void * arg){
static int h4_set_baudrate(uint32_t baudrate){ static int h4_set_baudrate(uint32_t baudrate){
#ifdef _STM32F205RGT6_ #ifdef _STM32F205RGT6_
// directly use STM peripheral functions to change baud rate dynamically
log_info("h4_set_baudrate %u", (int) baudrate);
const platform_gpio_t* gpio = wiced_bt_uart_pins[WICED_BT_PIN_UART_TX];
// set TX pin as GPIO // directly use STM peripheral functions to change baud rate dynamically
// set TX to high
log_info("h4_set_baudrate %u", (int) baudrate);
const platform_gpio_t* gpio = wiced_bt_uart_pins[WICED_BT_PIN_UART_TX];
platform_gpio_output_high(gpio);
// reconfigure TX pin as GPIO
GPIO_InitTypeDef gpio_init_structure; GPIO_InitTypeDef gpio_init_structure;
gpio_init_structure.GPIO_Speed = GPIO_Speed_50MHz; gpio_init_structure.GPIO_Speed = GPIO_Speed_50MHz;
gpio_init_structure.GPIO_Mode = GPIO_Mode_OUT; gpio_init_structure.GPIO_Mode = GPIO_Mode_OUT;
@ -195,15 +198,22 @@ static int h4_set_baudrate(uint32_t baudrate){
GPIO_Init( gpio->port, &gpio_init_structure ); GPIO_Init( gpio->port, &gpio_init_structure );
// disable USART // disable USART
USART_InitTypeDef uart_init_structure;
USART_Cmd( wiced_bt_uart_peripheral->port, DISABLE ); USART_Cmd( wiced_bt_uart_peripheral->port, DISABLE );
// setup init structure // setup init structure
USART_InitTypeDef uart_init_structure;
uart_init_structure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; uart_init_structure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
uart_init_structure.USART_BaudRate = baudrate; uart_init_structure.USART_BaudRate = baudrate;
uart_init_structure.USART_WordLength = USART_WordLength_8b; uart_init_structure.USART_WordLength = USART_WordLength_8b;
uart_init_structure.USART_StopBits = USART_StopBits_1; uart_init_structure.USART_StopBits = USART_StopBits_1;
uart_init_structure.USART_Parity = USART_Parity_No;
uart_init_structure.USART_HardwareFlowControl = USART_HardwareFlowControl_RTS_CTS;
#ifdef WICED_BT_UART_MANUAL_CTS_RTS0
uart_init_structure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
#endif
printf("BRR before 0x%04x\n", wiced_bt_uart_peripheral->port->BRR);
USART_Init(wiced_bt_uart_peripheral->port, &uart_init_structure); USART_Init(wiced_bt_uart_peripheral->port, &uart_init_structure);
printf("BRR after 0x%04x\n", wiced_bt_uart_peripheral->port->BRR);
// enable USART again // enable USART again
USART_Cmd( wiced_bt_uart_peripheral->port, ENABLE ); USART_Cmd( wiced_bt_uart_peripheral->port, ENABLE );
@ -211,7 +221,7 @@ static int h4_set_baudrate(uint32_t baudrate){
// set TX pin as USART again // set TX pin as USART again
gpio_init_structure.GPIO_Mode = GPIO_Mode_AF; gpio_init_structure.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init( gpio->port, &gpio_init_structure ); GPIO_Init( gpio->port, &gpio_init_structure );
#else #else
log_error("h4_set_baudrate not implemented for this WICED Platform"); log_error("h4_set_baudrate not implemented for this WICED Platform");
#endif #endif
@ -238,12 +248,7 @@ static int h4_open(void *transport_config){
wiced_rtos_delay_milliseconds( 100 ); wiced_rtos_delay_milliseconds( 100 );
// -- init UART // -- init UART
#ifdef WICED_BT_UART_MANUAL_CTS_RTS0
// configure TX pin as output and set to high to prevent dropping it during baud rate change
platform_gpio_init(wiced_bt_uart_pins[WICED_BT_PIN_UART_TX], OUTPUT_PUSH_PULL);
platform_gpio_output_high(wiced_bt_uart_pins[WICED_BT_PIN_UART_TX]);
#ifdef WICED_BT_UART_MANUAL_CTS_RTS
// configure RTS pin as output and set to high // configure RTS pin as output and set to high
platform_gpio_init(wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS], OUTPUT_PUSH_PULL); platform_gpio_init(wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS], OUTPUT_PUSH_PULL);
platform_gpio_output_high(wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS]); platform_gpio_output_high(wiced_bt_uart_pins[WICED_BT_PIN_UART_RTS]);