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cpu/sam0_common: added SERCOM clk control functions

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This commit is contained in:
Hauke Petersen 2017-09-04 13:07:38 +02:00
parent b2f40534b1
commit 48ef1cd6c9
1 changed files with 54 additions and 0 deletions
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54
cpu/sam0_common/include/periph_cpu_common.h
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@ -217,6 +217,60 @@ static inline int sercom_id(void *sercom)
#endif
}
/**
* @brief Enable peripheral clock for given SERCOM device
*
* @param[in] sercom SERCOM device
*/
static inline void sercom_clk_en(void *sercom)
{
#if defined(CPU_FAM_SAMD21)
PM->APBCMASK.reg |= (PM_APBCMASK_SERCOM0 << sercom_id(sercom));
#elif defined(CPU_FAM_SAML21)
if (sercom_id(sercom) < 5) {
MCLK->APBCMASK.reg |= (MCLK_APBCMASK_SERCOM0 << sercom_id(sercom));
} else {
MCLK->ABPDMASK.reg |= (MCLK_APBCMASK_SERCOM5);
}
#endif
}
/**
* @brief Disable peripheral clock for given SERCOM device
*
* @param[in] sercom SERCOM device
*/
static inline void sercom_clk_dis(void *sercom)
{
#if defined(CPU_FAM_SAMD21)
PM->APBCMASK.reg &= ~(PM_APBCMASK_SERCOM0 << sercom_id(sercom));
#elif defined(CPU_FAM_SAML21)
if (sercom_id(sercom) < 5) {
MCLK->APBCMASK.reg &= ~(MCLK_APBCMASK_SERCOM0 << sercom_id(sercom));
} else {
MCLK->ABPDMASK.reg &= ~(MCLK_APBCMASK_SERCOM5);
}
#endif
}
/**
* @brief Configure generator clock for given SERCOM device
*
* @param[in] sercom SERCOM device
* @param[in] gclk Generator clock
*/
static inline void sercom_set_gen(void *sercom, uint32_t gclk)
{
#if defined(CPU_FAM_SAMD21)
GCLK->CLKCTRL.reg = (GCLK_CLKCTRL_CLKEN | gclk |
(SERCOM0_GCLK_ID_CORE + sercom_id(sercom)));
while (GCLK->STATUS.reg & GCLK_STATUS_SYNCBUSY) {}
#elif defined(CPU_FAM_SAML21)
GCLK->PCHCTRL[SERCOM0_GCLK_ID_CORE + sercom_id(sercom)].reg =
(GCLK_PCHCTRL_CHEN | gclk);
#endif
}
/**
* @brief ADC Channel Configuration
*/