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SiLabs Pearl: SPI pinmappings 

Correct routing for SPI pins on Pearl
pull/1501/head
jhokajar 2015-10-23 13:24:00 +03:00 committed by Steven Cooreman
parent 97a1674a94
commit 745d72aeea
1 changed files with 33 additions and 1 deletions
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34
libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/spi_api.c
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@ -196,6 +196,28 @@ void spi_enable_pins(spi_t *obj, uint8_t enable, PinName mosi, PinName miso, Pin
}
/* Enabling pins and setting location */
#ifdef _USART_ROUTEPEN_RESETVALUE
uint32_t route = USART_ROUTEPEN_CLKPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_CLKLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(clk, PinMap_SPI_CLK)<<_USART_ROUTELOC0_CLKLOC_SHIFT;
if (mosi != NC) {
route |= USART_ROUTEPEN_TXPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_TXLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(mosi, PinMap_SPI_MOSI)<<_USART_ROUTELOC0_TXLOC_SHIFT;
}
if (miso != NC) {
route |= USART_ROUTEPEN_RXPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_RXLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(mosi, PinMap_SPI_MOSI)<<_USART_ROUTELOC0_RXLOC_SHIFT;
}
if (!obj->spi.master) {
route |= USART_ROUTEPEN_CSPEN;
obj->spi.spi->ROUTELOC0 &= ~_USART_ROUTELOC0_CSLOC_MASK;
obj->spi.spi->ROUTELOC0 |= pin_location(mosi, PinMap_SPI_MOSI)<<_USART_ROUTELOC0_CSLOC_SHIFT;
}
obj->spi.spi->ROUTEPEN = route;
#else
uint32_t route = USART_ROUTE_CLKPEN | (obj->spi.location << _USART_ROUTE_LOCATION_SHIFT);
if (mosi != NC) {
@ -209,7 +231,7 @@ void spi_enable_pins(spi_t *obj, uint8_t enable, PinName mosi, PinName miso, Pin
}
obj->spi.spi->ROUTE = route;
}
#endif
void spi_enable(spi_t *obj, uint8_t enable)
{
USART_Enable(obj->spi.spi, (enable ? usartEnable : usartDisable));
@ -306,14 +328,24 @@ void spi_format(spi_t *obj, int bits, int mode, int slave)
}
//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;
usart_init(obj, 100000, databits, (slave ? false : true), clockMode);
//restore state
#ifdef _USART_ROUTEPEN_RESETVALUE
uint32_t route = obj->spi.spi->ROUTEPEN;
uint32_t loc = obj->spi.spi->ROUTELOC0;
#else
obj->spi.spi->ROUTE = route;
#endif
obj->spi.spi->IEN = iflags;
if(enabled) spi_enable(obj, enabled);