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eink board serial flash seems to work

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This commit is contained in:
geeksville
2020-09-28 14:10:33 -07:00
parent a0fd83428f
commit 6a4ef7e1d1
3 changed files with 95 additions and 17 deletions
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variants/eink/variant.h
+20 -17
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@@ -30,7 +30,7 @@
soonish:
hook cdc acm device to debug output
fix bootloader to use two buttons - remove bootloader hacks
get second button working in app load
DONE get second button working in app load
fix display width and height
clean up eink drawing to not have the nasty timeout hack
measure current draws
@@ -48,8 +48,14 @@ add factory/power on self test
use tp_ser_io as a button, it goes high when pressed unify eink display classes
feedback to give:
remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
* remove ipx connector for nfc, instead use two caps and loop traces on the back of the board as an antenna?
* I've made the serial flash chip work, but if you do a new spin of the board I recommend:
connect pin 3 and pin 7 of U4 to spare GPIOs on the processor (instead of their current connections),
This would allow using 4 bit wide interface mode to the serial flash.
doubling the transfer speed! see example here:
https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/nrf52840_DK/hw_external_memory.html?cp=4_0_4_7_4
*/
/*----------------------------------------------------------------------------
@@ -108,11 +114,10 @@ static const uint8_t A0 = PIN_A0;
*/
/*
This serial port is _also_ connected to the incoming D+/D- pins from the USB header. FIXME, figure out how that is supposed to
work.
No longer populated on PCB
*/
#define PIN_SERIAL2_RX (0 + 6)
#define PIN_SERIAL2_TX (0 + 8)
//#define PIN_SERIAL2_RX (0 + 6)
//#define PIN_SERIAL2_TX (0 + 8)
// #define PIN_SERIAL2_EN (0 + 17)
/**
@@ -130,23 +135,21 @@ work.
#define PIN_RTC_INT (0 + 16) // Interrupt from the PCF8563 RTC
/*
FIXME define/FIX flash access
External serial flash WP25R1635FZUIL0
*/
// QSPI Pins
#define PIN_QSPI_SCK 19
#define PIN_QSPI_CS 17
#define PIN_QSPI_IO0 20
#define PIN_QSPI_IO1 21
#define PIN_QSPI_IO2 22
#define PIN_QSPI_IO3 23
#define PIN_QSPI_SCK (32 + 14)
#define PIN_QSPI_CS (32 + 15)
#define PIN_QSPI_IO0 (32 + 12) // MOSI if using two bit interface
#define PIN_QSPI_IO1 (32 + 13) // MISO if using two bit interface
//#define PIN_QSPI_IO2 22 // WP if using two bit interface (i.e. not used)
//#define PIN_QSPI_IO3 23 // HOLD if using two bit interface (i.e. not used)
// On-board QSPI Flash
#define EXTERNAL_FLASH_DEVICES MX25R6435F
#define EXTERNAL_FLASH_DEVICES MX25R1635F
#define EXTERNAL_FLASH_USE_QSPI
*/
/*
* Lora radio
*/