Revision 20:166e033d5073, committed 2017-12-30

Comitter:

seanburford

Date:

Sat Dec 30 05:31:11 2017 +0000

Parent:

19:1a13f0c067b1

Commit message:

Start SWIN voltage measurement with startBatV()

Changed in this revision

--- a/main.cpp	Tue Nov 28 06:07:43 2017 +0000
+++ b/main.cpp	Sat Dec 30 05:31:11 2017 +0000
@@ -1,9 +1,7 @@
 #include "mbed.h"
-#include "rtos.h"
 
-#include "gpio_api.h"
 #include "max32625pico.h"
-#include "pwrman_regs.h"
+#include "max14750.h"
 
 #include "USBSerial.h"
 USBSerial serial;
@@ -12,86 +10,27 @@
 static DigitalOut gLED(LED2);
 static DigitalOut bLED(LED3);
 
-int gpioAlternatePullup(PinName name) {
-    // Enable high resistance pullups per AN6350 section 5.2.4.1
-    int result = E_NO_ERROR;
-    unsigned int port = PINNAME_TO_PORT(name);
-    unsigned int pin = PINNAME_TO_PIN(name);
-    MXC_IOMAN->wud_req0 |= ((1 << pin) << (port << 3));  // pinmask
-    if (MXC_IOMAN->wud_ack0 != MXC_IOMAN->wud_req0) {
-        result = E_BUSY;
-    }
-    if (result == E_NO_ERROR) {
-        MXC_PWRMAN->wud_ctrl = MXC_F_PWRMAN_WUD_CTRL_CTRL_ENABLE;
-        MXC_PWRMAN->wud_ctrl |= (port << 3) + pin;  // Pad select
-        MXC_PWRMAN->wud_ctrl &= ~(MXC_F_PWRMAN_WUD_CTRL_PAD_MODE);
-        MXC_PWRMAN->wud_ctrl |= (MXC_E_PWRMAN_PAD_MODE_WEAK_HI_LO <<
-                                 MXC_F_PWRMAN_WUD_CTRL_PAD_MODE_POS);
-        MXC_PWRMAN->wud_pulse0 = 1;
-    }
-    MXC_PWRMAN->wud_ctrl = 0;
-    MXC_IOMAN->wud_req0 = 0;
-    return result;
-}
 
-typedef enum {
-    UNKNOWN,
-    MAX14720A,
-    MAX14720B,
-    MAX14720C,
-    MAX14720D,
-    MAX14750A,
-    MAX14750B,
-    MAX14750C
-} chip_t;
-
-void showRegisters(char* regs) {
-    // Datasheet table 28 "Register Default Values"
-    int i;
-    for (i = 0; i < 0x20; i++) {
-        serial.printf("%02X ", regs[i]);
+void readMax14750Regs(MAX14750* max14750) {
+    char regs[0x20] = {};
+    if (max14750->readRegs(regs) != E_NO_ERROR) return;
+    for (int i = 0; i < 32; i++) {
+        serial.printf("%02X:%02X ", i, (int)regs[i]);
     }
     serial.printf("\r\n");
-    if (regs[0] != 0x01) return;
-    chip_t chipType = UNKNOWN;
-    // regs[6] BoostCfg
-    if (regs[6] == 0xC0) {
-        // regs[7] BuckVSet
-        switch(regs[7]) {
-        case 0x08: chipType = MAX14750A; break;
-        case 0x20: chipType = MAX14750B; break;
-        case 0x0A: chipType = MAX14750C; break;
-        default: break;
-        }
-    } else if (regs[6] == 0xE0) {
-        bool aOrB = false;
-        // regs[9] BuckISet
-        switch(regs[9]) {
-        case 0xA7: aOrB = true; break;
-        case 0x07: chipType = MAX14720C; break;
-        case 0x47: chipType = MAX14720D; break;
-        default: break;
-        }
-        if (aOrB) {
-            // regs[B] LDOCfg
-            if (regs[0x0B] == 0x80) {
-                chipType = MAX14720A;
-            } else if (regs[0x0B] == 0xE1) {
-                chipType = MAX14720B;
-            }
-        }
+    MAX14750::chip_t chipType = max14750->identify(regs);
+    switch(chipType) {
+    case MAX14750::MAX14750A: serial.printf("MAX14750A\r\n"); break;
+    case MAX14750::MAX14750B: serial.printf("MAX14750B\r\n"); break;
+    case MAX14750::MAX14750C: serial.printf("MAX14750C\r\n"); break;
+    case MAX14750::MAX14720A: serial.printf("MAX14720A\r\n"); break;
+    case MAX14750::MAX14720B: serial.printf("MAX14720B\r\n"); break;
+    case MAX14750::MAX14720C: serial.printf("MAX14720C\r\n"); break;
+    case MAX14750::MAX14720D: serial.printf("MAX14720D\r\n"); break;
     }
-    switch(chipType) {
-    case MAX14750A: serial.printf("MAX14750A\r\n"); break;
-    case MAX14750B: serial.printf("MAX14750B\r\n"); break;
-    case MAX14750C: serial.printf("MAX14750C\r\n"); break;
-    case MAX14720A: serial.printf("MAX14720A\r\n"); break;
-    case MAX14720B: serial.printf("MAX14720B\r\n"); break;
-    case MAX14720C: serial.printf("MAX14720C\r\n"); break;
-    case MAX14720D: serial.printf("MAX14720D\r\n"); break;
-    }
-    if ((chipType == MAX14750A) || (chipType == MAX14750B) ||
-        (chipType == MAX14750C)) {
+    if ((chipType == MAX14750::MAX14750A) ||
+        (chipType == MAX14750::MAX14750B) ||
+        (chipType == MAX14750::MAX14750C)) {
         serial.printf("SWIN: %s\r\n", regs[0x1B] & 8? "high": "low");
         serial.printf("HVEN: %s\r\n", regs[0x1B] & 4? "high": "low");
         serial.printf("BEN:  %s\r\n", regs[0x1B] & 2? "high": "low");
@@ -99,24 +38,6 @@
     }
 }
 
-void readMax14750Regs(I2C* i2c) {
-    const int addr = 0x54;
-    char buf[0x20] = {};
-    // Request register 0.
-    buf[0] = 0x00;
-    bool writeFailed = i2c->write(addr, (char*)&buf, 1, false);
-    if (writeFailed) {
-        serial.printf("i2c write 0x54 failed\r\n");
-        return;
-    }
-    // Read 32 register values.
-    if (i2c->read(addr + 1, (char*)(&buf[0]), 0x20, false) != 0) {
-        serial.printf("i2c read 0x55 failed\r\n");
-        return;
-    }
-    showRegisters(buf);
-}
-
 int main()
 {
     rLED = LED_ON;
@@ -126,11 +47,8 @@
     MAX32625PICO pico(
         MAX32625PICO::IOH_3V3, MAX32625PICO::VIO_IOH, MAX32625PICO::VIO_IOH);
 
-    gpioAlternatePullup(P3_4);
-    gpioAlternatePullup(P3_5);
-
-    I2C i2c(P3_4, P3_5);
-    i2c.frequency(100000);
+    MAX14750 max14750;
+    max14750.init(P3_4, P3_5);
 
     rLED = LED_OFF;
     gLED = LED_OFF;
@@ -138,6 +56,10 @@
     while(1) {
         char c = serial.getc();
         serial.printf("%c\r\n", c);
-        readMax14750Regs(&i2c);
+        if (c == 'v') {
+            max14750.startBatV();
+        } else {
+            readMax14750Regs(&max14750);
+        }
     }
 }
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max14750.lib	Sat Dec 30 05:31:11 2017 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/seanburford/code/max14750/#3b5d9c4e6882