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stm32: Reduce adc_pins storage size in stm32f0_adc.c 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2020-10-07 11:38:44 -04:00
parent d985b53ccb
commit a8069e9ba8
1 changed files with 7 additions and 19 deletions
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26
src/stm32/stm32f0_adc.c
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@ -15,23 +15,11 @@
DECL_CONSTANT("ADC_MAX", 4095);
static const uint32_t adc_pins[][2] = {
{GPIO('A', 0), ADC_CHSELR_CHSEL0},
{GPIO('A', 1), ADC_CHSELR_CHSEL1},
{GPIO('A', 2), ADC_CHSELR_CHSEL2},
{GPIO('A', 3), ADC_CHSELR_CHSEL3},
{GPIO('A', 4), ADC_CHSELR_CHSEL4},
{GPIO('A', 5), ADC_CHSELR_CHSEL5},
{GPIO('A', 6), ADC_CHSELR_CHSEL6},
{GPIO('A', 7), ADC_CHSELR_CHSEL7},
{GPIO('B', 0), ADC_CHSELR_CHSEL8},
{GPIO('B', 1), ADC_CHSELR_CHSEL9},
{GPIO('C', 0), ADC_CHSELR_CHSEL10},
{GPIO('C', 1), ADC_CHSELR_CHSEL11},
{GPIO('C', 2), ADC_CHSELR_CHSEL12},
{GPIO('C', 3), ADC_CHSELR_CHSEL13},
{GPIO('C', 4), ADC_CHSELR_CHSEL14},
{GPIO('C', 5), ADC_CHSELR_CHSEL15}
static const uint8_t adc_pins[] = {
GPIO('A', 0), GPIO('A', 1), GPIO('A', 2), GPIO('A', 3),
GPIO('A', 4), GPIO('A', 5), GPIO('A', 6), GPIO('A', 7),
GPIO('B', 0), GPIO('B', 1), GPIO('C', 0), GPIO('C', 1),
GPIO('C', 2), GPIO('C', 3), GPIO('C', 4), GPIO('C', 5),
};
struct gpio_adc
@ -42,7 +30,7 @@ gpio_adc_setup(uint32_t pin)
for (chan=0; ; chan++) {
if (chan >= ARRAY_SIZE(adc_pins))
shutdown("Not a valid ADC pin");
if (adc_pins[chan][0] == pin)
if (adc_pins[chan] == pin)
break;
}
@ -82,7 +70,7 @@ gpio_adc_setup(uint32_t pin)
gpio_peripheral(pin, GPIO_ANALOG, 0);
return (struct gpio_adc){ .adc = adc, .chan = adc_pins[chan][1] };
return (struct gpio_adc){ .adc = adc, .chan = 1 << chan };
}
// Try to sample a value. Returns zero if sample ready, otherwise