cause I needed the TFT on SPI2 I rewrote the library and renamed it to Adafruit_ILI9341_STM_SPI2 so it can easily coexist with the standard lib so if you need it you can run two independent ILI9341’s simultaneous. Better example would be to use with a another device on SPI1, like NRF24 (as I did) or SD-Card. Benefit would be to use both DMA channels for SPI. Another benefit is you won’t take care of which SPI you are taking to in the sketch, every ILI9341 functions is automatically on SPI2.
Usage is simple: Just put the SPI lines of the TFT module to SPI2, the rest of the pins can be changed by software.
All examples should include the “#include <Adafruit_ILI9341_STM_SPI2.h>”, DMA tested successfully (I didn’t have to change anything “DMA” related in the code, because of the smart SPI library, hope that’s right) , so it runs out of the box.
Ray: The DMA implementation was done by Victor, I’ve only ported the library (as I can remember).
BTW: Setting different SPI ports is a bit blurry for me:
http://www.stm32duino.com/viewtopic.php … spi2#p3923
so I guess
SPIClass SecondSPI(2);
SecondSPI.setClockDivider(SPI_CLOCK_DIV32);
<…>
Ray: The DMA implementation was done by Victor, I’ve only ported the library (as I can remember).
I have come to another problem on it, but this belongs to nearly every library with SPI:
Assume that you have two SPI devices on one port:
A touch controller (XPT2046 as example)
A ILI9341
The ILI9341 works with a low clock divider (setClockDivider(2))
The XPT2046 needs at least setClockDivider(4) (if not 8)
So in both libraries you need a setClockDivider() line before each SPI execution.
(The example above is a bad example, because I don’t use the XPT2046 SPI library, but UTouch -> http://www.rinkydinkelectronics.com/library.php?id=55 this lib runs out of the box and is far more precise than the adafruit one)
Adding the call to change the divider in each of the ILI9341 (or the nRF905 lib) code would probably slow things down a bit.
As long as you know a device’s limitations, you can probably code more efficiently in your own code (in the sketch), rather than adding code to set the divider in each of the library calls.
Like: NRF and/or XPT2046 on SPI1 and the ILI9341, SD-Card, Winbond EEPROM’s on SPI2
For sure it would be better to use “high speed SPI devices” on SPI1, but I won’t rewrite the radiohead library (If somebody digged into the code of this lib, know what I mean…)
I’ve avoided using RadioHead as it looks like a massive amount of code. it would probably take ages to port, and I’d only end up using 10% of it.
I found a simple nRF905 library and hacked it a lot to get it to work on the STM32 (but as its a hack I’m not adding it as a library, as the code is now rather messy)
But it works fine 
<…>
I see no sense in “supporting everything” in one lib.
First of all thank you for the library.
I could not display images on the screen with the following connections.
SPI works on channel 1.
I checked the connections over and over again and the screen remains white.
#include "SPI.h"
#include <Adafruit_GFX_AS.h>
#include <Adafruit_ILI9341_STM_SPI2.h> // STM32 DMA Hardware-specific library
#define TFT_CS PB4
#define TFT_DC PA15
#define TFT_RST PB3
Adafruit_ILI9341_STM tft = Adafruit_ILI9341_STM(TFT_CS, TFT_DC, TFT_RST); // Use hardware SPI
you can use the default library from the Roger’s (or my) repo, it was implemented the possibility to pass the SPI instance as input paramter to the library.
So you can define which SPI interface you would like to use, and also the frequency if different from 36MHz:
#include <Adafruit_ILI9341_STM.h> // no need to include SPI.h
SPIClass mySPI(2); // use SPI2
Adafruit_ILI9341_STM tft(TFT_CS, TFT_DC, TFT_RST);
void setup()
{
...
tft.begin(mySPI); // this will set the SPI clock to 36MHz.
/* alternative:
uint32_t frequency = 18000000;
tft.begin(mySPI, frequency);
*/
...
}
#include "SPI.h"
#include <Adafruit_GFX_AS.h>
#include <Adafruit_ILI9341_STM.h> // STM32 DMA Hardware-specific library
#define TFT_CS PB4
#define TFT_DC PA15
#define TFT_RST PB3
SPIClass mySPI(2); // use SPI2
Adafruit_ILI9341_STM tft(TFT_CS, TFT_DC, TFT_RST);
void Setup(){
tft.begin(mySPI);
tft.fillScreen(ILI9341_BLACK);
}
#include <SPI.h>
#include <Adafruit_GFX_AS.h>
#include <Adafruit_ILI9341_STM.h>
#define TFT_CS PB4
#define TFT_DC PA15
#define TFT_RST PB3
SPIClass mySPI(2); // use SPI2
Adafruit_ILI9341_STM tft(TFT_CS, TFT_DC, TFT_RST);
void setup()
{
Serial.begin(9600);
while ( !Serial );
delay(1000);
Serial.println("ILI9341 Test!");
tft.begin();
}
void loop()
{
tft.fillScreen(ILI9341_BLACK);
delay(1000);
tft.fillScreen(ILI9341_RED);
delay(1000);
tft.fillScreen(ILI9341_GREEN);
delay(1000);
tft.fillScreen(ILI9341_BLUE);
}
this code did not work !
tft.begin(mySPI);
I also tried doing
How old is your repository local copy?
Because PB3/PB4/PA15 are used by the debug interface, they were previously reserved for debugging, and not available as normal IO pins.
With this patch this problem has been fixed, so you should update your local copy from github.
And then try this:
#include <SPI.h>
#include <Adafruit_GFX_AS.h>
#include <Adafruit_ILI9341_STM.h>
#define TFT_CS PB4
#define TFT_DC PA15
#define TFT_RST PB3
SPIClass mySPI(2); // use SPI2
Adafruit_ILI9341_STM tft(TFT_CS, TFT_DC, TFT_RST);
void setup()
{
tft.begin();
}
void loop()
{
tft.fillScreen(ILI9341_BLACK);
delay(1000);
tft.fillScreen(ILI9341_RED);
delay(1000);
tft.fillScreen(ILI9341_GREEN);
delay(1000);
tft.fillScreen(ILI9341_BLUE);
delay(1000);
}
my @file wirish/stm32f1/wirish_debug.cpp
void enableDebugPorts(void) {
afio_cfg_debug_ports(AFIO_DEBUG_SW_ONLY);
}
btw did you get working ?.
// spi2
#define TFT_CS PB12
#define TFT_DC PB11
#define TFT_RST PB10
HardwareTimer pwmtimer(1);
const int pwmOutPin = PA8;
/*----------------ROTARY_ENCODER2 ----------------*/
// timer4 as encoder 1
#define CLK1 PB6
#define DT1 PB7
#define SW1 PB11
/*----------------ROTARY_ENCODER2 ----------------*/
// timer3 as encoder 2
#define CLK2 PA7
#define DT2 PA6
#define SW2 PB12
And TFT_DC and SW1 to PB11.
Check again which pins are you mapping for which function.
EDIT
This is working on my bluepill:
// spi2
#define TFT_CS PB12
#define TFT_DC PB11
#define TFT_RST PB10
//SPIClass SPI_2(2); // use SPI2
Adafruit_ILI9341_STM tft(TFT_CS, TFT_DC, TFT_RST);
void blink(void)
{
digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
}
void setup()
{
pinMode(LED_BUILTIN, OUTPUT);
Serial.begin();
while (!Serial); delay(10);
SPI.setModule(2); // use SPI2
tft.begin(SPI, 9000000); // set direct frequency value in MHz
}
void loop()
{
Serial.println(millis());
blink();
tft.fillScreen(ILI9341_BLACK);
delay(250);
tft.fillScreen(ILI9341_RED);
delay(250);
tft.fillScreen(ILI9341_GREEN);
delay(250);
tft.fillScreen(ILI9341_BLUE);
delay(250);
}
Thank you very much , it worked very well , I wish just wish the rest of the men “mostly likely as i got to know many here over 2 years thus i doubt ever they would learn what giving means ” around here just learn from your great wonderful mind. thank you again.
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