LeafLabs Garden » Topic: RET6 and SPI2

LeafLabs Garden » Topic: RET6 and SPI2 http://forums.leaflabs.com/topic.php?id=1457 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:07:08 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php asterix on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-11781 Tue, 17 Jul 2012 03:52:51 +0000 asterix 11781@http://forums.leaflabs.com/ If your peripheral requires 5v tolerance and can only check on spi2, I'm wondering perhaps if the device requires a common earth / ground in order to work? I've found that has been the case a few times. Good luck! robodude666 on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-11770 Mon, 16 Jul 2012 20:27:41 +0000 robodude666 11770@http://forums.leaflabs.com/ Can you guys post code of how you're setting up SPI and using it? Keep in mind that, while libmaple will setup NSS for you, you must still manually toggle it (at least it did when I used SPI on a Maple last). I have made this little helper for my projects a while ago: SPIHelper.c <pre><code>#include <stdint.h> #include "wirish.h" #include "SPIHelper.h" // SPI1 Pin Defines #define SCK_PIN 5 #define MISO_PIN 6 #define MOSI_PIN 7 static bool spi1_initalized = false; void SPI1_Init() { if(spi1_initalized == true) return; uint32 cfg_flags = SPI_FRAME_MSB | SPI_DFF_8_BIT | SPI_SW_SLAVE | SPI_SOFT_SS; timer_set_mode(TIMER3, TIMER_CH1, TIMER_DISABLED); timer_set_mode(TIMER3, TIMER_CH2, TIMER_DISABLED); spi_init(SPI1); gpio_set_mode(GPIOA, 4, GPIO_AF_OUTPUT_PP); gpio_set_mode(GPIOA, SCK_PIN, GPIO_AF_OUTPUT_PP); gpio_set_mode(GPIOA, MISO_PIN, GPIO_INPUT_FLOATING); gpio_set_mode(GPIOA, MOSI_PIN, GPIO_AF_OUTPUT_PP); spi_master_enable(SPI1, SPI_BAUD_PCLK_DIV_256, SPI_MODE_0, cfg_flags); spi1_initalized = true; #ifdef USBDEBUG SerialUSB.println("SPI1 Enabled."); #endif } uint8_t SPI1_Receive(uint8_t data) { spi_tx(SPI1, &data, 1); while (!spi_is_rx_nonempty(SPI1)); return (uint8_t)spi_rx_reg(SPI1); } void SPI1_Send(uint8_t *data, uint16_t len) { while(len--) SPI1_Receive(*data++); } void SPI1_Send(uint8_t data) { SPI1_Receive(data); }</code></pre> SPIHelper.h <pre><code>#ifndef __SPIHelper_H__ #define __SPIHelper_H__ void SPI1_Init(); uint8_t SPI1_Receive(uint8_t data); void SPI1_Send(uint8_t *data, uint16_t len); void SPI1_Send(uint8_t data); #define SPI_SetupNSS(gpio, pin) gpio_set_mode(gpio, pin, GPIO_OUTPUT_PP) #define SPI_SelectLow(gpio, pin) gpio->regs->BRR = (1 << pin) #define SPI_SelectHigh(gpio, pin) gpio->regs->BSRR = (1 << pin) #endif</code></pre> With usage: <pre><code>#define SPI_PORT GPIOA #define SPI_NSS 4 SPI1_Init(); SPI_SetupNSS(SPI_PORT, SPI_NSS);</code></pre> I know it ends up being redundant, as libmaple and wirish have similar functionality... but for some reason I decided mine was better a year or more ago when I wrote the above code... Don't remember now, lol. The above can easily adapted to support SPI1 and SPI2 if need-be. Alternatively, it can be used to compare between what you're doing... I know mine works, and has worked in SPI2 (though I don't have that snippet available :( Booo HDD failures). -robodude666 gbulmer on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-11768 Mon, 16 Jul 2012 14:34:01 +0000 gbulmer 11768@http://forums.leaflabs.com/ AFAIK, the spi(1) example had an error, mentioned in <a href="http://forums.leaflabs.com/topic.php?id=1457#post-8608" rel="nofollow">http://forums.leaflabs.com/topic.php?id=1457#post-8608</a> Have you done those changes too? (Full disclosure: I am not a member of Leafabs staff.) suso-mc on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-11766 Mon, 16 Jul 2012 14:12:26 +0000 suso-mc 11766@http://forums.leaflabs.com/ I must connect a SD card shield to SPI(2) of a Maple Rev5. I put wires in correct pìns (31->NSS, 32->SCK, 33->MISO, 34->MOSI). I use the example file FileSys.ped, in wich i change the line "HardwareSPI spi(1);" with "HardwareSPI spi(2);" And ....... DONT WORK!! What is happening? When I use SPI(1) it works fine. Anyone can help me? poslathian on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-8652 Thu, 15 Mar 2012 13:41:40 +0000 poslathian 8652@http://forums.leaflabs.com/ you may be running into that NSS issue, see this thread <a href="http://forums.leaflabs.com/topic.php?id=1020" rel="nofollow">http://forums.leaflabs.com/topic.php?id=1020</a> mconners on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-8609 Tue, 13 Mar 2012 09:42:41 +0000 mconners 8609@http://forums.leaflabs.com/ Thanks for the response. I will try again. I just wanted to make sure I wasn't chasing something that wasn't gonna work anyway. manitou on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-8608 Tue, 13 Mar 2012 08:58:29 +0000 manitou 8608@http://forums.leaflabs.com/ I have been using SPI 2 on RET6 with various SPI devices. I've only used SPI 1 a few times. I haven't had any problems. Though in porting Arduino SPI sketches, I had to move the pinMode(SS,OUTPUT) to after the spi.begin(). Also for some devices I had to add a delay(1) before the digitalWrite(SS,HIGH); -- otherwise, it seemed the SPI transaction wasn't completing. I've been mainly using the lower KHz modes so I can see things with my USB scope. mconners on "RET6 and SPI2" http://forums.leaflabs.com/topic.php?id=1457#post-8600 Mon, 12 Mar 2012 18:48:17 +0000 mconners 8600@http://forums.leaflabs.com/ Are there any known issues with SPI2 on the RET6 version of the board. I took a known good device (an sd card reader) put it on SPI 1, ran some code, worked fine. I moved the wires to SPI 2, changed the code appropriately, doesn't work. I'm basically running the FileSys sketch that came with one of the SDFat libraries. I checked my wiring alot, changed it back and forth between the two ports and each time same result, works on 1, not on 2. The issue is really that I have another device that will need the 5v tolerant pins on SPI2 but I was having no luck communicating with that, so I thought I would troubleshoot with a known good device and code. Thanks, MikeC