len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-11-09 21:22:39 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

imx233/fuze+: rework lradc/adc code, add external temperature sensing(battery)

Browse source 
Rework code to be more useful:
- move battery channel init to lradc
- always init lradc from system (previously from adc)
- don't reserve channels for vddio, nmos or pmos
- implement external temperature sensing using current source
- use this for battery sensing on the Fuze+ (calibration needed)

Change-Id: I5f9a24b9243db7d1e6bdb16b84bc891e61d0c318
This commit is contained in:
Amaury Pouly 2012-03-17 17:39:27 +01:00
parent 7676dae3e0
commit e5b5041583
7 changed files with 135 additions and 51 deletions
Download patch file Download diff file Expand all files Collapse all files

13
firmware/target/arm/imx233/lradc-imx233.h
View file

@ -43,8 +43,14 @@
#define HW_LRADC_CTRL2__TEMP_ISRC1_BM 0xf0
#define HW_LRADC_CTRL2__TEMP_ISRC0_BP 0
#define HW_LRADC_CTRL2__TEMP_ISRC0_BM 0xf
#define HW_LRADC_CTRL2__TEMP_ISRCx_BP(x) (4 * (x))
#define HW_LRADC_CTRL2__TEMP_ISRCx_BM(x) (0xf << (4 * (x)))
#define HW_LRADC_CTRL2__TEMP_ISRC__0uA 0
#define HW_LRADC_CTRL2__TEMP_ISRC__20uA 1
#define HW_LRADC_CTRL2__TEMP_ISRC__300uA 15
#define HW_LRADC_CTRL2__TEMP_SENSOR_IENABLE0 (1 << 8)
#define HW_LRADC_CTRL2__TEMP_SENSOR_IENABLE1 (1 << 9)
#define HW_LRADC_CTRL2__TEMP_SENSOR_IENABLEx(x) (1 << (8 + (x)))
#define HW_LRADC_CTRL2__TEMPSENSE_PWD (1 << 15)
#define HW_LRADC_CTRL2__DIVIDE_BY_TWO(x) (1 << ((x) + 24))
@ -59,7 +65,7 @@
#define HW_LRADC_STATUS (*(volatile uint32_t *)(HW_LRADC_BASE + 0x40))
#define HW_LRADC_CHx(x) (*(volatile uint32_t *)(HW_LRADC_BASE + 0x50 + (x) * 0x10))
#define HW_LRADC_CHx__NUM_SAMPLES_BM (0xf << 24)
#define HW_LRADC_CHx__NUM_SAMPLES_BM (0x1f << 24)
#define HW_LRADC_CHx__NUM_SAMPLES_BP 24
#define HW_LRADC_CHx__ACCUMULATE 29
#define HW_LRADC_CHx__VALUE_BM 0x3ffff
@ -127,8 +133,11 @@ void imx233_lradc_reserve_delay(int dchannel);
void imx233_lradc_release_delay(int dchan);
/* enable sensing and return temperature in kelvin,
* channels must already be configured as nmos and pmos */
* channels needs not to be configured */
int imx233_lradc_sense_die_temperature(int nmos_chan, int pmos_chan);
/* return *raw* external temperature, might need some transformation
* channel needs not to be configured */
int imx233_lradc_sense_ext_temperature(int chan, int sensor);
void imx233_lradc_setup_battery_conversion(bool automatic, unsigned long scale_factor);
// read scaled voltage, only available after proper setup