Mercurial > public > hwos_code
diff src/i2c.asm @ 640:8c1f1f334275
3.13 release
| author | heinrichsweikamp |
|---|---|
| date | Thu, 29 Oct 2020 09:29:15 +0100 |
| parents | 4050675965ea |
| children | 7d8a4c60ec1a 5b7fe7777425 |
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--- a/src/i2c.asm Mon Aug 10 15:34:38 2020 +0200 +++ b/src/i2c.asm Thu Oct 29 09:29:15 2020 +0100 @@ -1003,12 +1003,25 @@ movlw 0x01 ; point to control reg B rcall I2C_TX_GAUGE ; send byte to the LT2942 gauge IC movlw b'11111000' ; automatic conversion every two seconds - movff WREG,SSP1BUF ; data byte TODO: movwf ?? + movwf SSP1BUF ; data byte rcall WaitMSSP ; wait for TX to complete rcall I2C_Check_ACK ; check for acknowledge by receiver bsf SSP1CON2,PEN ; stop condition bra WaitMSSP ; wait for TX to complete and return +;----------------------------------------------------------------------------- +; Sleep Gauge IC +; + global lt2942_sleep +lt2942_sleep: + movlw 0x01 ; point to control reg B + rcall I2C_TX_GAUGE ; send byte to the LT2942 gauge IC + movlw b'00111000' ; sleep + movwf SSP1BUF ; data byte + rcall WaitMSSP ; wait for TX to complete + rcall I2C_Check_ACK ; check for acknowledge by receiver + bsf SSP1CON2,PEN ; stop condition + bra WaitMSSP ; wait for TX to complete and return ;----------------------------------------------------------------------------- ; Read Gauge IC - Status Register @@ -1083,12 +1096,23 @@ btfss cc_active ; in CC charging mode? return ; NO - not charging, done + ; ignore false readings (>125°C) + movlw LOW .3307 + movwf sub_a+0 + movlw HIGH .3307 + movwf sub_a+1 + MOVII battery_temperature, sub_b + call cmpU16 ; sub_a - sub_b (with UNSIGNED values) + btfsc neg_flag ; result negative? + return ; YES - temperature > 125°C, not possible here. Skip test. + ; check for over-temperature while charging MOVLI max_battery_charge_temp,sub_a MOVII battery_temperature, sub_b call cmpU16 ; sub_a - sub_b (with UNSIGNED values) btfss neg_flag ; result negative? return ; NO - temperature <= threshold, ok, done + return ; YES - too hot, disable charging circuitry bsf charge_disable ; - set charging-inhibit signal bcf charge_enable ; - activate charging-inhibit signal