1 files changed, 54 insertions, 0 deletions
diff --git a/fw/fe310/eos/dev/batt.c b/fw/fe310/eos/dev/batt.c
new file mode 100644
index 0000000..6f1eb97
--- /dev/null
+++ b/fw/fe310/eos/dev/batt.c
@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "eos.h"
+#include "soc/pwr.h"
+
+#include "drv/bq25895.h"
+
+#ifdef EOS_DEBUG
+#include <stdio.h>
+#endif
+
+int eos_batt_init(void) {
+    uint8_t wakeup_cause;
+    int rst, rv;
+#ifdef EOS_DEBUG
+    uint8_t data;
+    int i;
+#endif
+
+    rv = EOS_OK;
+
+    wakeup_cause = eos_pwr_wakeup_cause();
+    rst = (wakeup_cause == EOS_PWR_WAKE_RST);
+    if (rst) {
+        // if (!rv) rv = bq25895_reg_write(0x14, 0x80);  // reset
+        // if (!rv) rv = bq25895_reg_write(0x14, 0x00);
+        if (!rv) rv = bq25895_reg_write(0x07, 0x8d);  // disable watchdog
+        if (!rv) rv = bq25895_reg_write(0x03, 0x2e);  // disable charging, 3.7V minimum output
+    }
+    if (rv) return rv;
+
+#ifdef EOS_DEBUG
+    printf("BQ25895:\n");
+    for (i=0; i<0x15; i++) {
+        rv = bq25895_reg_read(i, &data);
+        if (!rv) printf("  REG%.2X: %.2X\n", i, data);
+    }
+#endif
+
+    return EOS_OK;
+}
+
+int eos_batt_read_fault(uint8_t *fault0, uint8_t *fault1) {
+    int rv;
+
+    rv = bq25895_read_fault(fault0);
+    if (rv) return rv;
+
+    rv = bq25895_read_fault(fault1);
+    if (rv) return rv;
+
+    return EOS_OK;
+}
+\ No newline at end of file