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SAMD51 CircuitPython: enable high drive strength (maybe, need to confirm pin indexing)

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Phillip Burgess 2023-09-10 16:31:06 -07:00
parent 4430d1ceb5
commit a6dec45c38
1 changed files with 29 additions and 0 deletions
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29
src/arch/samd51.h
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@ -47,6 +47,21 @@
#define F_CPU (120000000)
// Enable high output driver strength on one pin. Arduino does this by
// default on pinMode(OUTPUT), but CircuitPython requires the motions...
static void _hi_drive(uint8_t pin) {
// For Arduino testing only:
// pin = g_APinDescription[pin].ulPort * 32 + g_APinDescription[pin].ulPin;
// Input, pull-up and peripheral MUX are disabled as we're only using
// vanilla PORT writes on Protomatter GPIO.
PORT->Group[pin / 32].WRCONFIG.reg =
(pin & 16)
? PORT_WRCONFIG_WRPINCFG | PORT_WRCONFIG_DRVSTR |
PORT_WRCONFIG_HWSEL | (1 << (pin & 15))
: PORT_WRCONFIG_WRPINCFG | PORT_WRCONFIG_DRVSTR | (1 << (pin & 15));
}
#else
// Other port register lookups go here
@ -157,6 +172,20 @@ void _PM_timerInit(Protomatter_core *core) {
NVIC_EnableIRQ(timer[timerNum].IRQn);
// Timer is configured but NOT enabled by default
#if defined(CIRCUITPY) // See notes earlier; Arduino doesn't need this.
// Enable high drive strength on all Protomatter pins. TBH this is kind
// of a jerky place to do this (it's not actually related to the timer
// peripheral) but Protomatter doesn't really have a spot for it.
uint8_t i;
for (i = 0; i < core->parallel * 6; i++)
_hi_drive(core->rgbPins[i]);
for (i = 0; i < core->numAddressLines; i++)
_hi_drive(core->addr[i].pin);
_hi_drive(core->clockPin);
_hi_drive(core->latch.pin);
_hi_drive(core->oe.pin);
#endif
}
// Set timer period, initialize count value to zero, enable timer.