From b9b02a5e73d6a0b34408210ca0ae9b27d3c77deb Mon Sep 17 00:00:00 2001 From: Ondrej Jirman Date: Wed, 16 Jun 2021 14:44:18 +0200 Subject: [PATCH] Update some comments --- firmware/main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/firmware/main.c b/firmware/main.c index b5168d3..7a3cad9 100644 --- a/firmware/main.c +++ b/firmware/main.c @@ -270,6 +270,9 @@ static uint8_t i2c_regs[I2C_N_REGS] = {0xaa, 0x55}; static uint8_t i2c_cmd[I2C_N_REGS]; static uint8_t i2c_cmd_len = 0; +//XXX: how to determine end of I2C transaction from the interrupt? +//XXX: we need this to be able to determine when it's safe to go back to sleep/power down + void i2c_b_interupt(void) __interrupt(IRQ_I2CB) { uint8_t saved_page = PAGESW; @@ -410,11 +413,12 @@ void main(void) //uint16_t ticks = 0; while (1) { if (!run_tasks) { - // power down + // power down (timers don't work in power-down) //PCON |= BIT(1); - - // go to idle CPU mode when there's nothing to do + // go to idle CPU mode when there's nothing to do (doesn't help much) + // switching to LOSC may work better //PCON |= BIT(0); + __asm__("nop"); continue; }