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Mc33 timings (#1453) 

* mc33 flash check

* DI sanity checks for setting HV config

* mc33 timings

Co-authored-by: Christopher W. Anderson <gitstuff@pswitch.com>
This commit is contained in:
NOx-z 2020-05-19 23:35:18 -07:00 committed by GitHub
parent e4f6d10188
commit b71403de7a
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3 changed files with 40 additions and 0 deletions
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32
firmware/hw_layer/mc33816.cpp
View File

@ -150,6 +150,36 @@ void mcUpdateDram(MC33816Mem addr, unsigned short data) {
spiUnselect(driver);
}
static short dacEquation(unsigned short current) {
/*
Current, given in mA->A
I = (DAC_VALUE * V_DAC_LSB - V_DA_BIAS)/(G_DA_DIFF * R_SENSEx)
DAC_VALUE = ((I*G_DA_DIFF * R_SENSEx) + V_DA_BIAS) / V_DAC_LSB
V_DAC_LSB is the DAC resolution = 9.77mv
V_DA_BIAS = 250mV
G_DA_DIFF = Gain: 5.79, 8.68, [12.53], 19.25
R_SENSE = 10mOhm soldered on board
*/
return (short)(((current/1000.0f * 12.53f * 10) + 250.0f) / 9.77f);
}
static void setTimings() {
// Convert mA to DAC values
mcUpdateDram(MC33816Mem::Iboost, dacEquation(CONFIG(mc33_i_boost)));
mcUpdateDram(MC33816Mem::Ipeak, dacEquation(CONFIG(mc33_i_peak)));
mcUpdateDram(MC33816Mem::Ihold, dacEquation(CONFIG(mc33_i_hold)));
// uint16_t mc33_t_max_boost; // not yet implemented in microcode
// in micro seconds to clock cycles
mcUpdateDram(MC33816Mem::Tpeak_off, (MC_CK * CONFIG(mc33_t_peak_off)));
mcUpdateDram(MC33816Mem::Tpeak_tot, (MC_CK * CONFIG(mc33_t_peak_tot)));
mcUpdateDram(MC33816Mem::Tbypass, (MC_CK * CONFIG(mc33_t_bypass)));
mcUpdateDram(MC33816Mem::Thold_off, (MC_CK * CONFIG(mc33_t_hold_off)));
mcUpdateDram(MC33816Mem::Thold_tot, (MC_CK * CONFIG(mc33_t_hold_tot)));
}
void setBoostVoltage(float volts)
{
// Sanity checks, Datasheet says not too high, nor too low
@ -499,6 +529,8 @@ static void mcRestart() {
download_register(REG_IO); // download IO register configurations
download_register(REG_DIAG); // download diag register configuration
setTimings();
// Finished downloading, let's run the code
enable_flash();
if(!check_flash())

2
firmware/hw_layer/mc33816.h
View File

@ -9,6 +9,8 @@
#include "global.h"
const int MC_CK = 6; // PLL x24 / CLK_DIV 4 = 6Mhz
const int MAX_SPI_MODE_A_TRANSFER_SIZE = 31; //max size for register config transfer
enum {

6
firmware/hw_layer/mc33816_memory_map.h
View File

@ -2,6 +2,12 @@
typedef enum {
Iboost = 0,
Ipeak = 1,
Ihold = 2,
Tpeak_off = 3,
Tpeak_tot = 4,
Tbypass = 5,
Thold_off = 6,
Thold_tot = 7,
Vboost_high = 64,
Vboost_low = 65,
Isense4_high = 66,