boards/common/blxxxpill: change PWM and QDEC configuration

- Use pins PB0, PB1, PB4, and PB5 for PWM instead PA8, PA9, PA10, and
  PA11
    - PA9 and PA10 is in pin conflict with UART_DEV(0) which is used
      for stdio with stdio_uart, PA8 was in conflict with QDEC_DEV(0),
      PA11 was in conflict with USB D-
- Use PB6, PB7 as QDEC_DEV(0) (previously QDEC_DEV(2)), as this is the
  only completely conflict free setting
- Use PB4/PB5 instead of PA6/PA7 for QDEC_DEV(1)
    - This fixes a pin conflict with SPI_DEV(0) MISO (and ADC_LINE(4))
- Only provide QDEC at PB4/PB5 when PWM is not used to avoid conflict
- Only provide QDEC at PA8/PA9 when UART is not used to avoid conflict

boards/common/blxxxpill/include/periph_conf.h

@@ -135,32 +135,38 @@ static const timer_conf_t timer_config[] = {
 
 static const qdec_conf_t qdec_config[] = {
  {
- .dev = TIM1,
+ .dev = TIM4,
  .max = 0x0000ffff,
- .rcc_mask = RCC_APB2ENR_TIM1EN,
- .chan = { { .pin = GPIO_PIN(PORT_A, 8), .cc_chan = 0 },
- { .pin = GPIO_PIN(PORT_A, 9), .cc_chan = 1 } },
- .bus = APB2,
- .irqn = TIM1_UP_IRQn
+ .rcc_mask = RCC_APB1ENR_TIM4EN,
+ .chan = { { .pin = GPIO_PIN(PORT_B, 6), .cc_chan = 0 },
+ { .pin = GPIO_PIN(PORT_B, 7), .cc_chan = 1 } },
+ .bus = APB1,
+ .irqn = TIM4_IRQn
  },
+ /* this conflicts with PWM */
+#ifndef MODULE_PERIPH_PWM
  {
  .dev = TIM3,
  .max = 0x0000ffff,
  .rcc_mask = RCC_APB1ENR_TIM3EN,
- .chan = { { .pin = GPIO_PIN(PORT_A, 6), .cc_chan = 0 },
- { .pin = GPIO_PIN(PORT_A, 7), .cc_chan = 1 } },
+ .chan = { { .pin = GPIO_PIN(PORT_B, 4), .cc_chan = 0 },
+ { .pin = GPIO_PIN(PORT_B, 5), .cc_chan = 1 } },
  .bus = APB1,
  .irqn = TIM3_IRQn
  },
+#endif
+ /* this conflicts with UART */
+#ifndef MODULE_PERIPH_UART
  {
- .dev = TIM4,
+ .dev = TIM1,
  .max = 0x0000ffff,
- .rcc_mask = RCC_APB1ENR_TIM4EN,
- .chan = { { .pin = GPIO_PIN(PORT_B, 6), .cc_chan = 0 },
- { .pin = GPIO_PIN(PORT_B, 7), .cc_chan = 1 } },
- .bus = APB1,
- .irqn = TIM4_IRQn
- }
+ .rcc_mask = RCC_APB2ENR_TIM1EN,
+ .chan = { { .pin = GPIO_PIN(PORT_A, 8), .cc_chan = 0 },
+ { .pin = GPIO_PIN(PORT_A, 9), .cc_chan = 1 } },
+ .bus = APB2,
+ .irqn = TIM1_UP_IRQn
+ },
+#endif
 };
 
 #define QDEC_NUMOF ARRAY_SIZE(qdec_config)
@@ -256,15 +262,15 @@ static const i2c_conf_t i2c_config[] = {
  */
 static const pwm_conf_t pwm_config[] = {
  {
- .dev = TIM1,
- .rcc_mask = RCC_APB2ENR_TIM1EN,
- .chan = { { .pin = GPIO_PIN(PORT_A, 8),  .cc_chan = 0 },
- { .pin = GPIO_PIN(PORT_A, 9),  .cc_chan = 1 },
- { .pin = GPIO_PIN(PORT_A, 10), .cc_chan = 2 },
- { .pin = GPIO_PIN(PORT_A, 11), .cc_chan = 3 } },
+ .dev = TIM3,
+ .rcc_mask = RCC_APB1ENR_TIM3EN,
+ .chan = { { .pin = GPIO_PIN(PORT_B, 0), .cc_chan = 2 },
+ { .pin = GPIO_PIN(PORT_B, 1), .cc_chan = 3 },
+ { .pin = GPIO_PIN(PORT_B, 4), .cc_chan = 0 },
+ { .pin = GPIO_PIN(PORT_B, 5), .cc_chan = 1 } },
  .af = GPIO_AF_OUT_PP,
- .bus = APB2
- }
+ .bus = APB1
+ },
 };
 
 #define PWM_NUMOF ARRAY_SIZE(pwm_config)

examples/saul/Makefile

@@ -12,8 +12,10 @@ USEMODULE += saul_default
 # include the shell:
 USEMODULE += shell
 USEMODULE += shell_cmds_default
+USEMODULE += shell_cmd_i2c_scan
 # additional modules for debugging:
 USEMODULE += ps
+USEMODULE += sht3x
 
 # Comment this out to disable code in RIOT that does safety checking
 # which is not needed in a production environment but helps in the