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Support SPI CPP objects with different pinouts sharing the same peripheral

pull/4074/head
Steven Cooreman 2017-03-30 12:42:25 +02:00
parent 632586e940
commit 680feb439e
2 changed files with 10 additions and 13 deletions
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3
targets/TARGET_Silicon_Labs/TARGET_EFM32/common/objects.h
View File

@ -117,7 +117,8 @@ struct serial_s {
#if DEVICE_SPI
struct spi_s {
USART_TypeDef *spi;
int location;
uint32_t location;
uint32_t route;
uint8_t bits;
uint8_t master;
#if DEVICE_SPI_ASYNCH

20
targets/TARGET_Silicon_Labs/TARGET_EFM32/spi_api.c
View File

@ -213,10 +213,12 @@ void spi_enable_pins(spi_t *obj, uint8_t enable, PinName mosi, PinName miso, Pin
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_CSLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(cs, PinMap_SPI_MOSI)<<_USART_ROUTELOC0_CSLOC_SHIFT;
}
obj->spi.location = obj->spi.spi->ROUTELOC0;
obj->spi.route = route;
obj->spi.spi->ROUTEPEN = route;
}
#else
uint32_t route = USART_ROUTE_CLKPEN | (obj->spi.location << _USART_ROUTE_LOCATION_SHIFT);
uint32_t route = USART_ROUTE_CLKPEN;
if (mosi != NC) {
route |= USART_ROUTE_TXPEN;
@ -227,7 +229,9 @@ void spi_enable_pins(spi_t *obj, uint8_t enable, PinName mosi, PinName miso, Pin
if (!obj->spi.master) {
route |= USART_ROUTE_CSPEN;
}
route |= obj->spi.location << _USART_ROUTE_LOCATION_SHIFT;
obj->spi.spi->ROUTE = route;
obj->spi.route = route;
}
#endif
void spi_enable(spi_t *obj, uint8_t enable)
@ -324,14 +328,6 @@ void spi_format(spi_t *obj, int bits, int mode, int slave)
default:
clockMode = usartClockMode0;
}
//save state
#ifdef _USART_ROUTEPEN_RESETVALUE
uint32_t route = obj->spi.spi->ROUTEPEN;
uint32_t loc = obj->spi.spi->ROUTELOC0;
#else
uint32_t route = obj->spi.spi->ROUTE;
#endif
uint32_t iflags = obj->spi.spi->IEN;
bool enabled = (obj->spi.spi->STATUS & (USART_STATUS_RXENS | USART_STATUS_TXENS)) != 0;
@ -339,10 +335,10 @@ void spi_format(spi_t *obj, int bits, int mode, int slave)
//restore state
#ifdef _USART_ROUTEPEN_RESETVALUE
obj->spi.spi->ROUTEPEN = route;
obj->spi.spi->ROUTELOC0 = loc;
obj->spi.spi->ROUTEPEN = obj->spi.route;
obj->spi.spi->ROUTELOC0 = obj->spi.location;
#else
obj->spi.spi->ROUTE = route;
obj->spi.spi->ROUTE = obj->spi.route;
#endif
obj->spi.spi->IEN = iflags;