Add GPIO controlled power supply support

fw/CMakeLists.txt

@@ -7,7 +7,7 @@ set(CMAKE_CXX_STANDARD 17)
 
 # initalize pico_sdk from installed location
 # (note this can come from environment, CMake cache etc)
-set(PICO_SDK_PATH "/home/wenting/pico/pico-sdk")
+set(PICO_SDK_PATH "/Users/wenting/pico/pico-sdk")
 
 # Pull in Raspberry Pi Pico SDK (must be before project)
 include(pico_sdk_import.cmake)
@@ -23,6 +23,7 @@ add_executable(fw
         fw.c
         utils.c
         fusb302.c
+        power.c
         ptn3460.c
         tcpm_driver.c
         tps65185.c
@@ -48,6 +49,7 @@ target_link_libraries(fw
         hardware_spi
         hardware_dma
         hardware_i2c
+        hardware_pwm
         )
 
 pico_add_extra_outputs(fw)

fw/config.h

@@ -0,0 +1,167 @@
+//
+// Copyright 2023 Wenting Zhang <zephray@outlook.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#pragma once
+
+/* BOARD REVISION CONFIGURATION */
+// Eariler revisions are not supported
+//#define BOARD_REV_R0P5
+#define BOARD_REV_R0P6
+
+/* SCREEN CONFIGURATION */
+
+// #define SCREEN_6_0_INCH
+// #define SCREEN_7_8_INCH
+// #define SCREEN_10_3_INCH
+// #define SCREEN_10_8_INCH
+#define SCREEN_13_3_INCH
+
+// #define SCREEN_800_600
+// #define SCREEN_1024_758
+// #define SCREEN_1448_1072
+#define SCREEN_1600_1200
+// #define SCREEN_1872_1404
+// #define SCREEN_1920_1080
+// #define SCREEN_2200_1650
+
+#define SCREEN_MONO
+// #define SCREEN_DES_COLOR
+
+
+/* SET BASED ON PREVIOUS DEFINES, DO NOT MODIFY */
+#if defined(BOARD_REV_R0P5)
+#define POWER_TPS65185
+#elif defined(BOARD_REV_R0P6)
+#define POWER_GPIO
+#else
+#error "Unknown board revision"
+#endif
+
+// Used in EDID
+#define SCREEN_ASPECT_16_10     0x00
+#define SCREEN_ASPECT_4_3       0x40
+#define SCREEN_ASPECT_5_4       0x80
+#define SCREEN_ASPECT_16_9      0xC0
+
+// Screen dimension in mm
+#if defined(SCREEN_6_0_INCH)
+#define SCREEN_SIZE_X   122
+#define SCREEN_SIZE_Y   91
+#define SCREEN_ASPECT   SCREEN_ASPECT_4_3
+#elif defined(SCREEN_7_8_INCH)
+#define SCREEN_SIZE_X   158
+#define SCREEN_SIZE_Y   119
+#define SCREEN_ASPECT   SCREEN_ASPECT_4_3
+#elif defined(SCREEN_10_3_INCH)
+#define SCREEN_SIZE_X   209
+#define SCREEN_SIZE_Y   157
+#define SCREEN_ASPECT   SCREEN_ASPECT_4_3
+#elif defined(SCREEN_10_8_INCH)
+#define SCREEN_SIZE_X   239
+#define SCREEN_SIZE_Y   134
+#define SCREEN_ASPECT   SCREEN_ASPECT_16_9
+#elif defined(SCREEN_13_3_INCH)
+#define SCREEN_SIZE_X   270
+#define SCREEN_SIZE_Y   203
+#define SCREEN_ASPECT   SCREEN_ASPECT_4_3
+#else
+#error "Unknown screen size"
+#endif
+
+// Screen timing
+#if defined(SCREEN_800_600)
+// 800x600 @ 60, 40MHz DMT
+#define SCREEN_CLK      40000
+#define SCREEN_HACT     800
+#define SCREEN_VACT     600
+#define SCREEN_HBLK     256
+#define SCREEN_HFP      40
+#define SCREEN_HSYNC    128
+#define SCREEN_VBLK     28
+#define SCREEN_VFP      1
+#define SCREEN_VSYNC    4
+#elif defined(SCREEN_1024_758)
+// 1024x758 @ 60, 62.5MHz CVT
+#define SCREEN_CLK      62500
+#define SCREEN_HACT     1024
+#define SCREEN_VACT     758
+#define SCREEN_HBLK     304
+#define SCREEN_HFP      48
+#define SCREEN_HSYNC    104
+#define SCREEN_VBLK     29
+#define SCREEN_VFP      3
+#define SCREEN_VSYNC    10
+#elif defined(SCREEN_1448_1072)
+// 1448x1072 @ 60, 128.5MHz CVT
+#define SCREEN_CLK      128500
+#define SCREEN_HACT     1448
+#define SCREEN_VACT     1072
+#define SCREEN_HBLK     480
+#define SCREEN_HFP      88
+#define SCREEN_HSYNC    152
+#define SCREEN_VBLK     40
+#define SCREEN_VFP      3
+#define SCREEN_VSYNC    10
+#elif defined(SCREEN_1600_1200)
+// 1600x1200 @ 60, 162MHz DMT
+#define SCREEN_CLK      162000
+#define SCREEN_HACT     1600
+#define SCREEN_VACT     1200
+#define SCREEN_HBLK     560
+#define SCREEN_HFP      64
+#define SCREEN_HSYNC    192
+#define SCREEN_VBLK     50
+#define SCREEN_VFP      1
+#define SCREEN_VSYNC    3
+#elif defined(SCREEN_1872_1404)
+// 1872x1404 @ 60, 162MHz Custom
+#define SCREEN_CLK      162000
+#define SCREEN_HACT     1872
+#define SCREEN_VACT     1404
+#define SCREEN_HBLK     38
+#define SCREEN_HFP      6
+#define SCREEN_HSYNC    10
+#define SCREEN_VBLK     10
+#define SCREEN_VFP      1
+#define SCREEN_VSYNC    3
+#elif defined(SCREEN_1920_1080)
+// 1920x1080 @ 60, 148.5MHz CEA-861/DMT
+#define SCREEN_CLK      148500
+#define SCREEN_HACT     1920
+#define SCREEN_VACT     1080
+#define SCREEN_HBLK     280
+#define SCREEN_HFP      88
+#define SCREEN_HSYNC    44
+#define SCREEN_VBLK     45
+#define SCREEN_VFP      4
+#define SCREEN_VSYNC    5
+#elif defined(SCREEN_2200_1650)
+// 2200x1650 @ 60, 224MHz Custom
+#define SCREEN_CLK      224000
+#define SCREEN_HACT     2200
+#define SCREEN_VACT     1650
+#define SCREEN_HBLK     36
+#define SCREEN_HFP      6
+#define SCREEN_HSYNC    10
+#define SCREEN_VBLK     20
+#define SCREEN_VFP      1
+#define SCREEN_VSYNC    5
+#endif

fw/fw.c

@@ -27,8 +27,7 @@
 #include "tcpm_driver.h"
 #include "usb_pd.h"
 #include "ptn3460.h"
-#include "tps65185.h"
-#include "max17135.h"
+#include "power.h"
 #include "fpga.h"
 
 int main()
@@ -52,7 +51,8 @@ int main()
     gpio_put(10, 0);
     gpio_set_dir(10, GPIO_OUT);
 
-    tps_init();
+    power_init();
+    power_enable(true); // TODO: should be dependent on DP signal valid
     fpga_init();
 
     ptn3460_init();

fw/max17135.c

@@ -57,6 +57,10 @@ void max_set_vcom(uint16_t vcom) {
     max_write(0x03, vcom & 0xff);
 }
 
+void max_enable(bool en) {
+    // TODO
+}
+
 void max_init(void) {
     //max_set_vcom(100); // -1V
     printf("Product Revision: %08x\n", max_read(0x06));

fw/max17135.h

@@ -21,4 +21,6 @@
 //
 #pragma once
 
-void tps_init(void);
+void max_init(void);
+void max_set_vcom(uint16_t vcom);
+void max_enable(bool en);

fw/power.c

@@ -0,0 +1,64 @@
+//
+// Copyright 2023 Wenting Zhang <zephray@outlook.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#include <stdio.h>
+#include "pico/stdlib.h"
+#include "hardware/pwm.h"
+#include "config.h"
+
+#if defined(POWER_GPIO)
+#define PWR_EN_GPIO     21
+#define PWR_VCOM_GPIO   22
+
+void power_init(void) {
+    gpio_put(PWR_EN_GPIO, 0);
+    gpio_init(PWR_EN_GPIO);
+    gpio_set_dir(PWR_EN_GPIO, GPIO_OUT);
+    gpio_set_function(PWR_VCOM_GPIO, GPIO_FUNC_PWM);
+    uint slice_num = pwm_gpio_to_slice_num(PWR_VCOM_GPIO);
+    // Set period to 256 cycles
+    pwm_set_wrap(slice_num, 255);
+    pwm_set_gpio_level(PWR_VCOM_GPIO, 127);
+}
+
+void power_enable(bool en) {
+    gpio_put(PWR_EN_GPIO, en);
+    uint slice_num = pwm_gpio_to_slice_num(PWR_VCOM_GPIO);
+    pwm_set_enabled(slice_num, en);
+}
+
+// vcom is in mV
+void power_set_vcom(int vcom) {
+    // Adjustable range:
+    // 0 = -3.27V
+    // 255 = -0.70V
+    int level = vcom / 10 + 324;
+    uint8_t level_u8;
+    if (level < 0)
+        level_u8 = 0;
+    else if (level > 255)
+        level_u8 = 255;
+    else
+        level_u8 = level;
+    pwm_set_gpio_level(PWR_VCOM_GPIO, level_u8);
+}
+
+#endif

fw/power.h

@@ -0,0 +1,44 @@
+//
+// Copyright 2023 Wenting Zhang <zephray@outlook.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#pragma once
+
+#if defined(POWER_TPS65185)
+#include "tps65185.h"
+
+#define power_init()        tps_init()
+#define power_enable(x)     tps_enable(x)
+#define power_set_vcom(x)   tps_set_vcom(x)
+
+#elif defined(POWER_MAX17135)
+#include "max17135.h"
+
+#define power_init()        max_init()
+#define power_enable(x)     max_enable(x)
+#define power_set_vcom(x)   max_set_vcom(x)
+
+#elif defined(POWER_GPIO)
+
+void power_init(void);
+void power_enable(bool en);
+void power_set_vcom(uint16_t vcom);
+
+#endif

fw/tps65185.c

@@ -60,6 +60,10 @@ void tps_set_vcom(uint16_t vcom) {
     tps_write(0x03, vcom & 0xff);
 }
 
+void tps_enable(bool en) {
+    gpio_put(TPS_EN_PIN, en);
+}
+
 void tps_init(void) {
     gpio_init(TPS_EN_PIN);
     gpio_put(TPS_EN_PIN, 1);

fw/tps65185.h

@@ -22,3 +22,5 @@
 #pragma once
 
 void tps_init(void);
+void tps_enable(bool en);
+void tps_set_vcom(uint16_t vcom);