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STM32F3 - Support hardware serial inversion.

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Tested on the Sparky board with an FrSky X4RSB without external hardware
inverter.
This commit is contained in:
Dominic Clifton 2014-12-26 12:10:27 +00:00
parent 2825eec39d
commit 916aa60254
2 changed files with 36 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

42
src/main/drivers/serial_uart.c
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@ -39,6 +39,31 @@ uartPort_t *serialUSART1(uint32_t baudRate, portMode_t mode);
uartPort_t *serialUSART2(uint32_t baudRate, portMode_t mode);
uartPort_t *serialUSART3(uint32_t baudRate, portMode_t mode);
static void usartConfigurePinInversion(uartPort_t *uartPort) {
#ifdef INVERTER
if (uartPort->port.inversion == SERIAL_INVERTED && uartPort->USARTx == INVERTER_USART) {
// Enable hardware inverter if available.
INVERTER_ON;
}
#endif
#ifdef STM32F303xC
uint32_t inversionPins = 0;
if (uartPort->port.mode & MODE_TX) {
inversionPins |= USART_InvPin_Tx;
}
if (uartPort->port.mode & MODE_RX) {
inversionPins |= USART_InvPin_Rx;
}
// Note: inversion when using MODE_BIDIR not supported yet.
USART_InvPinCmd(uartPort->USARTx, inversionPins, uartPort->port.inversion == SERIAL_INVERTED ? ENABLE : DISABLE);
#endif
}
static void uartReconfigure(uartPort_t *uartPort)
{
USART_InitTypeDef USART_InitStructure;
@ -63,22 +88,16 @@ static void uartReconfigure(uartPort_t *uartPort)
USART_InitStructure.USART_Mode |= USART_Mode_Tx | USART_Mode_Rx;
USART_Init(uartPort->USARTx, &USART_InitStructure);
usartConfigurePinInversion(uartPort);
USART_Cmd(uartPort->USARTx, ENABLE);
}
serialPort_t *uartOpen(USART_TypeDef *USARTx, serialReceiveCallbackPtr callback, uint32_t baudRate, portMode_t mode, serialInversion_e inversion)
{
UNUSED(inversion);
uartPort_t *s = NULL;
#ifdef INVERTER
if (inversion == SERIAL_INVERTED && USARTx == INVERTER_USART) {
// Enable hardware inverter if available.
INVERTER_ON;
}
#endif
if (USARTx == USART1) {
s = serialUSART1(baudRate, mode);
#ifdef USE_USART2
@ -101,12 +120,7 @@ serialPort_t *uartOpen(USART_TypeDef *USARTx, serialReceiveCallbackPtr callback,
s->port.callback = callback;
s->port.mode = mode;
s->port.baudRate = baudRate;
#if 1 // FIXME use inversion on STM32F3
s->port.inversion = SERIAL_NOT_INVERTED;
#else
s->port.inversion = inversion;
#endif
uartReconfigure(s);