drivers/mhz19: migrate to ztimer

drivers/mhz19/Kconfig

@@ -15,14 +15,16 @@ config MODULE_MHZ19_UART
     depends on HAS_PERIPH_UART
     select MODULE_PERIPH_UART
     select MODULE_MHZ19
-    select MODULE_XTIMER
+    select MODULE_ZTIMER
+    select MODULE_ZTIMER_MSEC
 
 config MODULE_MHZ19_PWM
     bool "MH-Z19 over PWM"
     depends on HAS_PERIPH_GPIO
     select MODULE_PERIPH_GPIO
     select MODULE_MHZ19
-    select MODULE_XTIMER
+    select MODULE_ZTIMER
+    select MODULE_ZTIMER_MSEC
 
 config MODULE_MHZ19
     bool

drivers/mhz19/Makefile.dep

@@ -1,4 +1,5 @@
-USEMODULE += xtimer
+USEMODULE += ztimer
+USEMODULE += ztimer_msec
 
 ifneq (,$(filter mhz19_pwm,$(USEMODULE)))
   FEATURES_REQUIRED += periph_gpio

drivers/mhz19/mhz19_pwm.c

@@ -22,7 +22,7 @@
 
 #include "mhz19.h"
 #include "mhz19_params.h"
-#include "xtimer.h"
+#include "ztimer.h"
 #include "mutex.h"
 
 #define ENABLE_DEBUG 0
@@ -61,26 +61,26 @@ int mhz19_get_ppm(mhz19_t *dev, int16_t *ppm)
     DEBUG("%s: Waiting for high level to end\n", __func__);
     while (gpio_read(dev->pin) && timeout) {
         timeout--;
-        xtimer_msleep(1);
+        ztimer_sleep(ZTIMER_MSEC, 1);
     }
 
     DEBUG("%s: Waiting for initial rising edge\n", __func__);
     while (!gpio_read(dev->pin) && timeout) {
         timeout--;
-        xtimer_msleep(1);
+        ztimer_sleep(ZTIMER_MSEC, 1);
     }
 
-    start = xtimer_now_usec() / US_PER_MS;
+    start = ztimer_now(ZTIMER_MSEC);
     DEBUG("%s: Waiting for falling edge\n", __func__);
     while (gpio_read(dev->pin) && timeout) {
         timeout--;
-        xtimer_msleep(1);
+        ztimer_sleep(ZTIMER_MSEC, 1);
     }
-    middle = xtimer_now_usec() / US_PER_MS;
+    middle = ztimer_now(ZTIMER_MSEC);
     DEBUG("%s: Waiting for rising edge\n", __func__);
     while (!gpio_read(dev->pin) && timeout) {
         timeout--;
-        xtimer_msleep(1);
+        ztimer_sleep(ZTIMER_MSEC, 1);
     }
 
     /* If we waited too long for flanks, something went wrong */
@@ -88,7 +88,7 @@ int mhz19_get_ppm(mhz19_t *dev, int16_t *ppm)
         DEBUG("%s: Measurement timed out\n", __func__);
         return MHZ19_ERR_TIMEOUT;
     }
-    end = xtimer_now_usec() / US_PER_MS;
+    end = ztimer_now(ZTIMER_MSEC);
 
     th = (middle - start);
     tl = (end - middle);

drivers/mhz19/mhz19_uart.c

@@ -24,7 +24,7 @@
 
 #include "mhz19.h"
 #include "mhz19_params.h"
-#include "xtimer.h"
+#include "ztimer.h"
 #include "mutex.h"
 
 #define ENABLE_DEBUG 0
@@ -137,7 +137,7 @@ static void mhz19_cmd(mhz19_t *dev, const uint8_t *in)
     uart_write(dev->params->uart, in, MHZ19_BUF_SIZE + 1);
 
     /* Add some delay after executing command */
-    xtimer_msleep(MHZ19_TIMEOUT_CMD);
+    ztimer_sleep(ZTIMER_MSEC, MHZ19_TIMEOUT_CMD);
 
     /* Unlock concurrency guard mutex */
     mutex_unlock(&dev->mutex);
@@ -165,10 +165,10 @@ static void mhz19_xmit(mhz19_t *dev, const uint8_t *in)
 
     /* By locking the same mutex another time, this thread blocks until
      * the UART ISR received all bytes and unlocks the mutex. If that does not
-     * happen, then xtimer_mutex_lock_timeout unlocks the mutex after as well
+     * happen, then ztimer_mutex_lock_timeout unlocks the mutex after as well
      * after the timeout expired.
      */
-    xtimer_mutex_lock_timeout(&dev->sync, MHZ19_TIMEOUT_CMD * US_PER_MS);
+    ztimer_mutex_lock_timeout(ZTIMER_MSEC, &dev->sync, MHZ19_TIMEOUT_CMD);
 
     /* Unlock synchronization for next transmission */
     mutex_unlock(&dev->sync);

tests/driver_mhz19/Makefile

@@ -1,6 +1,7 @@
 include ../Makefile.tests_common
 
-USEMODULE += xtimer
+USEMODULE += ztimer
+USEMODULE += ztimer_msec
 
 # set default device parameters in case they are undefined
 TEST_MODE ?= 1

tests/driver_mhz19/app.config.test

@@ -1,6 +1,7 @@
 # this file enables modules defined in Kconfig. Do not use this file for
 # application configuration. This is only needed during migration.
-CONFIG_MODULE_XTIMER=y
+CONFIG_MODULE_ZTIMER=y
+CONFIG_MODULE_ZTIMER_MSEC=y
 
 # Use UART mode by default
 CONFIG_MODULE_MHZ19_UART=y

tests/driver_mhz19/main.c

@@ -30,7 +30,7 @@
 #endif
 
 #include <stdio.h>
-#include "xtimer.h"
+#include "ztimer.h"
 #include "mhz19.h"
 #include "mhz19_params.h"
 
@@ -79,7 +79,7 @@ int main(void)
         printf("CO2: %d ppm\n", ppm);
 
         /* sleep between measurements */
-        xtimer_sleep(1);
+        ztimer_sleep(ZTIMER_MSEC, 1000);
     }
 
     return 0;