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sam0_common: replace sercom_id() calculation with switch statement

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As the sercom_id() function grows it gets more unweidly.
Let's replace it with a simple switch statement that is true for all
sam0 parts.
This commit is contained in:
Benjamin Valentin 2019-03-29 15:03:54 +01:00 committed by Benjamin Valentin
parent 31f88a2d0e
commit 84233ce5d5
1 changed files with 34 additions and 8 deletions
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42
cpu/sam0_common/include/periph_cpu_common.h
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@ -323,16 +323,42 @@ void gpio_init_mux(gpio_t pin, gpio_mux_t mux);
*
* @return numeric id of the given SERCOM device
*/
static inline int sercom_id(void *sercom)
static inline int sercom_id(const void *sercom)
{
#if defined(CPU_FAM_SAMD21)
return ((((uint32_t)sercom) >> 10) & 0x7) - 2;
#elif defined (CPU_FAM_SAML10) || defined (CPU_FAM_SAML11)
return ((((uint32_t)sercom) >> 10) & 0x7) - 1;
#elif defined(CPU_FAM_SAML21) || defined(CPU_FAM_SAMR30)
/* Left side handles SERCOM0-4 while right side handles unaligned address of SERCOM5 */
return ((((uint32_t)sercom) >> 10) & 0x7) + ((((uint32_t)sercom) >> 22) & 0x04);
#ifdef SERCOM0
if (sercom == SERCOM0)
return 0;
#endif
#ifdef SERCOM1
if (sercom == SERCOM1)
return 1;
#endif
#ifdef SERCOM2
if (sercom == SERCOM2)
return 2;
#endif
#ifdef SERCOM3
if (sercom == SERCOM3)
return 3;
#endif
#ifdef SERCOM4
if (sercom == SERCOM4)
return 4;
#endif
#ifdef SERCOM5
if (sercom == SERCOM5)
return 5;
#endif
#ifdef SERCOM6
if (sercom == SERCOM6)
return 6;
#endif
#ifdef SERCOM7
if (sercom == SERCOM7)
return 7;
#endif
return -1;
}
/**