diff options
| author | Dino Li <dino.li@ite.com.tw> | 2014-12-03 17:28:42 +0800 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-12-19 09:17:27 +0000 |
| commit | 165cf6c8813420e1ce525e103b42f19017228ec6 (patch) | |
| tree | ae6722100c5f3d6207fcf206645df2b25ed06654 /board/it8380dev | |
| parent | 7ec2e4158af7d5564038bc4b0336653445ba08c5 (diff) | |
| download | chrome-ec-165cf6c8813420e1ce525e103b42f19017228ec6.tar.gz | |
it8380dev: add adc control module
Add adc control module for emulation board.
The ADC converts the input voltage signal ranging
from 0v to 3v into a 10-bit unsigned integer.
Signed-off-by: Dino Li <dino.li@ite.com.tw>
BRANCH=none
BUG=none
TEST=manual test.
1 - adc channel 1, 3, 5, and 7 to ground.
2 - adc channel 0 and 2 to 1.26v.
3 - adc channel 4 and 6 to 1.72v.
4 - condition, factor_mul = 3000, factor_div = 1024, and shift = 0.
5 - console "adc", result as following.
adc_ch0 = 1256
adc_ch1 = 0
adc_ch2 = 1256
adc_ch3 = 0
adc_ch4 = 1722
adc_ch5 = 0
adc_ch6 = 1725
adc_ch7 = 0
Change-Id: I72efd09c9f7dbff25c4f6fd4846c9b1c1e5637ca
Reviewed-on: https://chromium-review.googlesource.com/228092
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Dino Li <dino.li@ite.com.tw>
Tested-by: Dino Li <dino.li@ite.com.tw>
Diffstat (limited to 'board/it8380dev')
| -rw-r--r-- | board/it8380dev/board.c | 16 | ||||
| -rw-r--r-- | board/it8380dev/board.h | 14 |
2 files changed, 30 insertions, 0 deletions
diff --git a/board/it8380dev/board.c b/board/it8380dev/board.c index 588ab4d0d7..201a6c20c0 100644 --- a/board/it8380dev/board.c +++ b/board/it8380dev/board.c @@ -13,6 +13,8 @@ #include "util.h" #include "pwm.h" #include "pwm_chip.h" +#include "adc.h" +#include "adc_chip.h" /* Test GPIO interrupt function that toggles one LED. */ void test_interrupt(enum gpio_signal signal) @@ -47,6 +49,20 @@ static void board_init(void) } DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT); +/* ADC channels. Must be in the exactly same order as in enum adc_channel. */ +const struct adc_t adc_channels[] = { + /* Convert to mV (3000mV/1024). */ + {"adc_ch0", 3000, 1024, 0, 0}, + {"adc_ch1", 3000, 1024, 0, 1}, + {"adc_ch2", 3000, 1024, 0, 2}, + {"adc_ch3", 3000, 1024, 0, 3}, + {"adc_ch4", 3000, 1024, 0, 4}, + {"adc_ch5", 3000, 1024, 0, 5}, + {"adc_ch6", 3000, 1024, 0, 6}, + {"adc_ch7", 3000, 1024, 0, 7}, +}; +BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT); + /*****************************************************************************/ /* Console commands */ diff --git a/board/it8380dev/board.h b/board/it8380dev/board.h index 1d612d32a2..afadc3c40b 100644 --- a/board/it8380dev/board.h +++ b/board/it8380dev/board.h @@ -29,5 +29,19 @@ enum pwm_channel { PWM_CH_COUNT }; +enum adc_channel { + ADC_CH_0, + ADC_CH_1, + ADC_CH_2, + ADC_CH_3, + ADC_CH_4, + ADC_CH_5, + ADC_CH_6, + ADC_CH_7, + + /* Number of ADC channels */ + ADC_CH_COUNT +}; + #endif /* !__ASSEMBLER__ */ #endif /* __BOARD_H */ |