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moved pinouts a bit & added reserved pins for SDA and SCL, added CTS/RTS stuff but not completely implemented yet

This commit is contained in:
Triss 2021-06-09 00:41:41 +02:00
parent c1ac0f89da
commit 74355f5eef
4 changed files with 44 additions and 26 deletions
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56
README.md
View File

@ -56,26 +56,29 @@ Raspberry Pi Pico.
The pin mapping for the RP2040 is as follows: The pin mapping for the RP2040 is as follows:
| Pin number | Usage | | Pin number | Usage | Usage | Pin number |
|:---------- |:-------------- | |:---------- |:-------------- | --------------:| ----------:|
| GP0 | stdio UART TX | | GP0 | stdio UART TX | | VBUS |
| GP1 | stdio UART RX | | GP1 | stdio UART RX | | VSYS |
| GND | <ground> | | GND | <ground> | <ground> | GND |
| GP2 | SWCLK/TCK | | GP2 | SWCLK/TCK | | 3V3 EN |
| GP3 | SWDIO/TMS | | GP3 | SWDIO/TMS | | 3V3 OUT |
| GP4 | UART TX | | GP4 | UART TX | | ADC VREF |
| GP5 | UART RX | | GP5 | UART RX | | GP28 / ADC2|
| GND | <ground> | | GND | <ground> | <ground> | GND / AGND|
| GP6 | TDI | | GP6 | TDI | | GP27 / ADC1|
| GP7 | TDO | | GP7 | TDO | | GP26 / ADC0|
| GP8 | nTRST | | GP8 | nTRST | | RUN |
| GP9 | nRESET | | GP9 | nRESET | | GP22 |
| GND | <ground> | | GND | <ground> | <ground> | GND |
| GP10 | SCLK | | GP10 | UART CTS | SCL | GP21 |
| GP11 | MOSI | | GP11 | UART RTS | SDA | GP20 |
| GP12 | MISO | | GP12 | MISO | | GP19 |
| GP13 | nCS | | GP13 | nCS | | GP18 |
| GND | <ground> | | GND | <ground> | <ground> | GND |
| GP14 | SCLK | | GP17 |
| GP15 | MOSI | | GP16 |
| <end>| <bottom> | <bottom> | <end>|
On the RP2040, two USB CDC interfaces are exposed: the first is the UART On the RP2040, two USB CDC interfaces are exposed: the first is the UART
interface, the second is for Serprog. If you have no other USB CDC devices, interface, the second is for Serprog. If you have no other USB CDC devices,
@ -120,15 +123,20 @@ libco is licensed under the [ISC license](https://opensource.org/licenses/ISC)
- [x] CMSIS-DAP JTAG implementation - [x] CMSIS-DAP JTAG implementation
- [x] Flashrom/SPI support using Serprog - [x] Flashrom/SPI support using Serprog
- [ ] Parallel ROM flashing support, too, by having the device switch into a
separate mode that temporarily disables all other IO protocols
- [ ] UART with CTS/RTS flow control - [ ] UART with CTS/RTS flow control
- Needs configurable stuff as well, as some UART interfaces won't use this.
- [ ] Debug interface to send printf stuff directly to USB, instead of having
- to use the UART interface as a loopback thing.
- [ ] I2C support by emulating the I2C Tiny USB - [ ] I2C support by emulating the I2C Tiny USB
- [ ] Expose RP2040-internal temperature ADC on I2C-over-USB bus? - [ ] Expose RP2040-internal temperature ADC on I2C-over-USB bus?
- Does SMBus stuff need special treatment here? - Does SMBus stuff need special treatment here?
- [ ] Maybe add some way of reconfiguring features while the device is running. - [ ] Maybe use the ADCs for something?
Eg. CTS/RTS enable/disable, temperature ADC I2C address, ...
- Maybe use the Serprog USB serial interface for this, with some extension
commands not typically used for Serprog.
- [ ] AVR programming (USBavr emulation?) - [ ] AVR programming (USBavr emulation?)
- AVR ISP is hardly used anymore
- TPI/UPDI requires 5V levels, Pico doesn't do that :/
- debugWIRE????
- Renesas E7-{0,1,2} programming thing???? - Renesas E7-{0,1,2} programming thing????
- Renesas tell us how this works pls - Renesas tell us how this works pls
- Maybe steal other features from the Bus Pirate or Glasgow or so - Maybe steal other features from the Bus Pirate or Glasgow or so

4
bsp/rp2040/cdc_uart.c
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@ -67,6 +67,10 @@ void cdc_uart_task(void) {
} }
} }
void cdc_uart_set_hwflow(bool enable) {
uart_set_hw_flow(PICOPROBE_UART_INTERFACE, enable, enable);
}
void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* line_coding) { void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* line_coding) {
picoprobe_info("New baud rate %d\n", line_coding->bit_rate); picoprobe_info("New baud rate %d\n", line_coding->bit_rate);
uart_init(PICOPROBE_UART_INTERFACE, line_coding->bit_rate); uart_init(PICOPROBE_UART_INTERFACE, line_coding->bit_rate);

6
bsp/rp2040/picoprobe_config.h
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@ -55,6 +55,8 @@
// UART config // UART config
#define PICOPROBE_UART_TX 4 #define PICOPROBE_UART_TX 4
#define PICOPROBE_UART_RX 5 #define PICOPROBE_UART_RX 5
#define PICOPROBE_UART_CTS 10
#define PICOPROBE_UART_RTS 11
#define PICOPROBE_UART_INTERFACE uart1 #define PICOPROBE_UART_INTERFACE uart1
#define PICOPROBE_UART_BAUDRATE 115200 #define PICOPROBE_UART_BAUDRATE 115200
@ -68,8 +70,8 @@
// SPI config // SPI config
#define PROBE_SPI_DEV spi1 #define PROBE_SPI_DEV spi1
#define PROBE_SPI_SCLK 10 #define PROBE_SPI_SCLK 14
#define PROBE_SPI_MOSI 11 #define PROBE_SPI_MOSI 15
#define PROBE_SPI_MISO 12 #define PROBE_SPI_MISO 12
#define PROBE_SPI_nCS 13 #define PROBE_SPI_nCS 13

4
protos.h
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@ -5,8 +5,12 @@
#include "protocfg.h" #include "protocfg.h"
#ifdef DBOARD_HAS_UART #ifdef DBOARD_HAS_UART
#include <stdbool.h>
void cdc_uart_init(void); void cdc_uart_init(void);
void cdc_uart_task(void); void cdc_uart_task(void);
void cdc_uart_set_hwflow(bool enable);
#endif #endif
#ifdef DBOARD_HAS_SERPROG #ifdef DBOARD_HAS_SERPROG