start clocks

Author: Grazfather

examples/nordic/nrf5x/src/blinky.zig

@@ -5,6 +5,7 @@ const nrf = microzig.hal;
 const time = nrf.time;
 
 const rtc_overflow_interrupt = nrf.time.rtc_overflow_interrupt;
+const uart = nrf.uart.num(0);
 
 pub const microzig_options = microzig.Options{
     .log_level = .debug,
@@ -15,20 +16,26 @@ pub const microzig_options = microzig.Options{
 pub fn main() !void {
     board.init();
 
+    uart.apply(.{
+        .tx_pin = board.uart_tx,
+        .rx_pin = board.uart_rx,
+    });
+
+    nrf.uart.init_logger(uart);
+
     while (true) {
         board.led1.toggle();
-        // std.log.info("Now: {}", .{time.get_time_since_boot()});
-        std.log.info("Counter: {}", .{microzig.chip.peripherals.RTC0.COUNTER});
-        // time.sleep_ms(500);
+        std.log.info("Now: {}", .{time.get_time_since_boot()});
+        time.sleep_ms(500);
 
         board.led1.toggle();
         board.led2.toggle();
-        // std.log.info("Now: {}", .{time.get_time_since_boot()});
-        // time.sleep_ms(500);
+        std.log.info("Now: {}", .{time.get_time_since_boot()});
+        time.sleep_ms(500);
 
         board.led2.toggle();
         board.led3.toggle();
-        // std.log.info("Now: {}", .{time.get_time_since_boot()});
-        // time.sleep_ms(500);
+        std.log.info("Now: {}", .{time.get_time_since_boot()});
+        time.sleep_ms(500);
     }
 }

port/nordic/nrf5x/src/hal/time.zig

@@ -36,14 +36,19 @@ pub fn init() void {
     // 'period' on two different events:
     // First, when it hits the halfway point, and again on overflow.
 
+    // TODO: Put this in clocks hal
+    // Set clock source
+    microzig.chip.peripherals.CLOCK.LFCLKSRC.modify(.{ .SRC = .RC });
+    // Start LFCLK
+    microzig.chip.peripherals.CLOCK.TASKS_LFCLKSTART.write_raw(1);
+
     // Enable interrupt firing on compare AND on overflow
     rtc.INTENSET.modify(.{
         .COMPARE3 = .Enabled,
         .OVRFLW = .Enabled,
     });
     // Set the comparator to trigger on overflow of bottom 23 bits
-    rtc.CC[COMPARE_INDEX].write(.{ .COMPARE = 0x8000 });
-    // rtc.CC[COMPARE_INDEX].write(.{ .COMPARE = 0x800000 });
+    rtc.CC[COMPARE_INDEX].write(.{ .COMPARE = 0x800000 });
 
     // Clear counter, then start timer
     switch (version) {