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configure unused GPIO, flash lightsense LED during boot for testing

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true 2024-10-28 08:05:03 -07:00
parent 1bc5289f4a
commit 33a42edc7f
1 changed files with 20 additions and 0 deletions
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20
nametag8_CH592/user/main.c
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@ -146,6 +146,21 @@ void systick_init(void)
SysTick->CTLR = SysTick_CTLR_STCLK | SysTick_CTLR_STE; // enable counter in /1 mode
}
void gpio_init()
{
// by default pins are floating inputs
// lightsense pins anode (PA5), cathode (PA14) low outputs
R32_PA_DIR = (1 << 5) | (1 << 14);
// configure unused as pullup
R8_PA_PU_1 = 0x8f; // unused PA8-11, PA15
R8_PB_PU_2 = 0x80; // unused PB23
// disable input buffer on unused pins
R32_PIN_CONFIG2 = 0x0200cf00; // also PA14, only ever an input
}
static void idle_clear()
{
@ -372,6 +387,9 @@ int main()
PWR_DCDCCfg(ENABLE); // enable DC-DC converter; brings significant power saving
gpio_init(); // configure default states for GPIO pins
R32_PA_OUT |= (1 << 14); // enable lightsense LED during boot for testing
i2c_init(); // get i2c initialized since most stuff will need it
uconf_load(); // read the user config
@ -399,6 +417,8 @@ int main()
rtcisr_init(); // configure main program tick interrupt
R32_PA_CLR = (1 << 14); // turn off lightsense LED now
lowprio_task(); // start the low priority task loop
}