ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Fixes to analogOut: 

* Implement _free
* Make sure the pin is set to disabled
pull/1501/head
Steven Cooreman 2016-01-05 16:46:42 +01:00
parent b4c171802e
commit a59c73c4de
1 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/analogout_api.c
View File

@ -42,6 +42,8 @@
#include "em_dac.h"
#include "em_cmu.h"
static uint8_t dac_initialized = 0;
uint8_t analogout_get_index(dac_t *obj)
{
return 0;
@ -54,12 +56,12 @@ void analogout_preinit(dac_t *obj, PinName pin)
obj->channel = pin_location(pin, PinMap_DAC);
MBED_ASSERT((int) obj->channel != NC);
pin_mode(pin, Disabled);
}
void analogout_init(dac_t *obj, PinName pin)
{
static uint8_t dac_initialized = 0;
/* init in-memory structure */
analogout_preinit(obj, pin);
@ -87,14 +89,18 @@ void analogout_init(dac_t *obj, PinName pin)
DAC_InitChannel(obj->dac, &initChannel, obj->channel);
}
void analogout_enable(dac_t *obj, uint8_t enable)
void analogout_free(dac_t *obj)
{
DAC_Enable(obj->dac, obj->channel, enable);
}
void analogout_pins_enable(dac_t *obj, uint8_t enable)
{
//not avail for EFM32
//Reset channel by re-initializing
DAC_InitChannel_TypeDef initChannel = DAC_INITCHANNEL_DEFAULT;
initChannel.enable = false;
DAC_InitChannel(obj->dac, &initChannel, obj->channel);
//Check all channels to see if we can disable the DAC completely
if((DAC->CH0CTRL & DAC_CH0CTRL_EN) == 0 && (DAC->CH1CTRL & DAC_CH1CTRL_EN) == 0) {
CMU_ClockEnable(cmuClock_DAC0, false);
dac_initialized = 0;
}
}
static inline void dac_write(dac_t *obj, int value)