michaelh/zephyr
1
0
Fork 0
Code Releases Activity

boards: lpcxpresso55s69: Add PWM support

Browse source 
Add PWM support

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>
This commit is contained in:
Mahesh Mahadevan 2021-09-02 16:42:12 -05:00 • committed by Christopher Friedt
commit 34ffd5a7d4
7 changed files with 64 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

4
boards/arm/lpcxpresso55s69/doc/index.rst
View file

@ -86,6 +86,8 @@ features:
+-----------+------------+-------------------------------------+
| I2S | on-chip | i2s |
+-----------+------------+-------------------------------------+
| PWM | on-chip | pwm |
+-----------+------------+-------------------------------------+
Targets available
==================
@ -153,6 +155,8 @@ functionality of a pin.
+---------+-----------------+----------------------------+
| PIO1_13 | I2S | I2S DATAIN |
+---------+-----------------+----------------------------+
| PIO0_15 | SCT0_OUT2 | PWM |
+---------+-----------------+----------------------------+
Memory mappings
===============

18
boards/arm/lpcxpresso55s69/lpcxpresso55s69_cpu0.dts
View file

@ -8,6 +8,7 @@
#include <nxp/nxp_lpc55S6x.dtsi>
#include "lpcxpresso55s69.dtsi"
#include <dt-bindings/pwm/pwm.h>
/ {
model = "NXP LPCXpresso55S69 board";
@ -21,6 +22,10 @@
sw0 = &user_button_1;
sw1 = &user_button_2;
sw2 = &user_button_3;
/* For pwm test suites */
pwm-0 = &sc_timer;
pwm-led0 = &red_pwm_led;
red-pwm-led = &red_pwm_led;
};
chosen {
@ -49,6 +54,15 @@
gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
};
};
pwmleds {
compatible = "pwm-leds";
red_pwm_led: red_pwm_led {
pwms = <&sc_timer 0 PWM_POLARITY_NORMAL>;
label = "Red PWM LED";
status = "okay";
};
};
};
&gpio0 {
@ -151,3 +165,7 @@ i2s1: &flexcomm7 {
dmas = <&dma0 19>;
dma-names = "tx";
};
&sc_timer {
status = "okay";
};

22
boards/arm/lpcxpresso55s69/pinmux.c
View file

@ -245,6 +245,28 @@ static int lpcxpresso_55s69_pinmux_init(const struct device *dev)
IOCON_PIO_DIGITAL_EN |
IOCON_PIO_OPENDRAIN_DI);
#endif
#if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(sc_timer), nxp_sctimer_pwm, okay) && CONFIG_PWM
/* Pin is configured as SCT0_OUT2 */
pinmux_pin_set(port0, 15, IOCON_PIO_FUNC4 |
IOCON_PIO_MODE_INACT |
IOCON_PIO_SLEW_STANDARD |
IOCON_PIO_INV_DI |
IOCON_PIO_DIGITAL_EN |
IOCON_PIO_OPENDRAIN_DI |
IOCON_PIO_ASW_EN);
#if DT_NODE_HAS_STATUS(DT_NODELABEL(red_pwm_led), okay)
/* Pin is configured as SCT0_OUT0 */
pinmux_pin_set(port1, 4, IOCON_PIO_FUNC4 |
IOCON_PIO_MODE_INACT |
IOCON_PIO_SLEW_STANDARD |
IOCON_PIO_INV_DI |
IOCON_PIO_DIGITAL_EN |
IOCON_PIO_OPENDRAIN_DI);
#endif
#endif
return 0;

10
dts/arm/nxp/nxp_lpc55S6x_common.dtsi
View file

@ -375,6 +375,16 @@
prescale = <0>;
label = "CTIMER_4";
};
sc_timer: pwm@85000 {
compatible = "nxp,sctimer-pwm";
reg = <0x85000 0x1000>;
interrupts = <12 0>;
status = "disabled";
prescaler = <2>;
label = "SC_TIMER";
#pwm-cells = <2>;
};
};
&nvic {

4
soc/arm/nxp_lpc/lpc55xxx/Kconfig.defconfig.lpc55S69_cpu0
View file

@ -54,4 +54,8 @@ config I2S_MCUX_FLEXCOMM
depends on I2S
select INIT_PLL0
config PWM_MCUX_SCTIMER
default y
depends on PWM
endif # SOC_LPC55S69_CPU0

1
soc/arm/nxp_lpc/lpc55xxx/Kconfig.soc
View file

@ -44,6 +44,7 @@ config SOC_LPC55S69_CPU0
select HAS_MCUX_USB_LPCIP3511
select USB_DEDICATED_MEMORY if USB_DEVICE_DRIVER
select HAS_MCUX_CTIMER
select HAS_MCUX_SCTIMER
config SOC_LPC55S69_CPU1
bool "SOC_LPC55S69 M33 [CPU 1]"

6
soc/arm/nxp_lpc/lpc55xxx/soc.h
View file

@ -27,10 +27,11 @@
#define IOCON_PIO_DIGITAL_EN 0x0100u /*!<@brief Enables digital function */
#define IOCON_PIO_FUNC0 0x00u /*!<@brief Selects pin function 0 */
#define IOCON_PIO_FUNC1 0x01u /*!<@brief Selects pin function 1 */
#define IOCON_PIO_FUNC2 0x02u /*!<@brief Selects pin function 1 */
#define IOCON_PIO_FUNC2 0x02u /*!<@brief Selects pin function 2 */
#define IOCON_PIO_FUNC4 0x04u /*!<@brief Selects pin function 4 */
#define IOCON_PIO_FUNC5 0x05u /*!<@brief Selects pin function 5 */
#define IOCON_PIO_FUNC7 0x07u /*!<@brief Selects pin function 5 */
#define IOCON_PIO_FUNC6 0x06u /*!<@brief Selects pin function 6 */
#define IOCON_PIO_FUNC7 0x07u /*!<@brief Selects pin function 7 */
#define IOCON_PIO_FUNC9 0x09u /*!<@brief Selects pin function 9 */
#define IOCON_PIO_FUNC10 0x0Au /*!<@brief Selects pin function 10 */
#define IOCON_PIO_INV_DI 0x00u /*!<@brief Input function not inverted */
@ -40,6 +41,7 @@
#define IOCON_PIO_SLEW_FAST 0x40u /*!<@brief Fast slew rate mode */
#define IOCON_PIO_MODE_PULLDOWN 0x10u /*!<@brief Selects pull-down function */
#define IOCON_PIO_MODE_PULLUP 0x20u /*!<@brief Selects pull-up function */
#define IOCON_PIO_ASW_EN 0x0400u /*!<@brief Analog switch is closed (enabled) */
#define IOCON_PIO_INPFILT_OFF 0x1000u /*!<@brief Input filter disabled */
#endif /* _SOC__H_ */