diff options
Diffstat (limited to 'firmware/target/mips/ingenic_jz47xx/xduoo_x3/sadc-xduoo_x3.c')
| -rw-r--r-- | firmware/target/mips/ingenic_jz47xx/xduoo_x3/sadc-xduoo_x3.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/firmware/target/mips/ingenic_jz47xx/xduoo_x3/sadc-xduoo_x3.c b/firmware/target/mips/ingenic_jz47xx/xduoo_x3/sadc-xduoo_x3.c index ffc6f25a38..b478beceeb 100644 --- a/firmware/target/mips/ingenic_jz47xx/xduoo_x3/sadc-xduoo_x3.c +++ b/firmware/target/mips/ingenic_jz47xx/xduoo_x3/sadc-xduoo_x3.c @@ -91,6 +91,9 @@ bool button_hold(void) return (__gpio_get_pin(PIN_BTN_HOLD) ? true : false); } +/* NOTE: Due to how this is wired, button combinations are not allowed + unless one of the two buttons is the POWER +*/ int button_read_device(void) { #ifndef BOOTLOADER @@ -104,8 +107,10 @@ int button_read_device(void) int btn = BUTTON_NONE; bool gpio_btn = (__gpio_get_pin(PIN_BTN_POWER) ? false : true); - REG_SADC_ADCFG = ADCFG_VBAT_SEL + ADCFG_CMD_AUX(1); - REG_SADC_ADENA = ADENA_VBATEN + ADENA_AUXEN; + /* Don't initiate a new request if we have one pending */ + if (!(REG_SADC_ADENA & (ADENA_VBATEN | ADENA_AUXEN))) { + REG_SADC_ADENA = ADENA_VBATEN | ADENA_AUXEN; + } #ifndef BOOTLOADER if (hold_button != hold_button_old) { @@ -192,6 +197,11 @@ int _battery_voltage(void) return (bat_val*BATTERY_SCALE_FACTOR)>>10; } +/* 12MHz XTAL + /61 = 196 MHz base clock (max is 200, err on the side of safety) + /(1+1) = 98.4KHz "us_clk (ie ~10us/tick) + /(199+1) = 983.6KHz "ms_clk" (ie ~1ms/tick) +*/ void adc_init(void) { bat_val = 0xfff; @@ -202,8 +212,8 @@ void adc_init(void) mdelay(70); REG_SADC_ADSTATE = 0; REG_SADC_ADCTRL = ADCTRL_MASK_ALL - ADCTRL_ARDYM - ADCTRL_VRDYM; - REG_SADC_ADCFG = ADCFG_VBAT_SEL + ADCFG_CMD_AUX(1); - REG_SADC_ADCLK = (4 << 16) | (1 << 8) | 59; /* 200KHz */ + REG_SADC_ADCFG = ADCFG_VBAT_SEL | ADCFG_CMD_AUX(1); /* VBAT_SEL is undocumented but required! */ + REG_SADC_ADCLK = (199 << 16) | (1 << 8) | 61; system_enable_irq(IRQ_SADC); } |