Forum Discussion
Honored ContributorHSMC GPIO Daughter card.
I have a question regarding the gpio-hstc card (http://www.terasic.com.tw/cgi-bin/page/archive.pl?language=english&categoryno=67&no=322&partno=1). I'd like to use this board to expand the gpio of my DE2-115 dev. board. In the documentation it states that the HSMC connector pins are connected to GPIO pins. Am I correct in thinking that there is no need for a driver in my design? Meaning I can just map a HSMC pin as if it is a GPIO pin, or do I need to do something more.
If you have any tips regarding the use of the board, I'd like to hear them as well.18 Replies
Altera_ForumHi there,
Your project gave funny numbers at HSMC_TX_D_p[16] (0.38V) and HSMC_RX_D_p[15] (0.34V), so I decided to start it all over by launching the DE2-115 system builder and keeping HSMC as default (you still have to select HSMC Default in the drag-down column). After making sure the jumper at HSM_VCCIO is installed on 2.5V, I then powered up the board I got 2.51V at both HSMC_TX_D_p[16] and HSMC_RX_D_p[15]. I've uploaded my project here for your reference. I understand it still doesn't explain why there's a small difference, but at least you could give it a try over there and see how it goes, given that I couldn't duplicate your result based on the project that you uploaded. David from Terasic- Altera_Forum
I'll try this and will get back to you with the results.
- Altera_Forum
I modified it to set all HSMC bidir and outputs high.
And all gave about 2.44V. When making them all 0 among others, pin RX_D_N(16) gave 1.72V and RX_D_N(15) gave 2.11V. Later today I will try this with my project and post the resultsassign HSMC_TX_D_P = 'b11111111111111111; assign HSMC_RX_D_P = 'b11111111111111111; assign HSMC_TX_D_N = 'b11111111111111111; assign HSMC_RX_D_N = 'b11111111111111111; assign SMC_CLKIN0 = 1; assign HSMC_CLKOUT_N1 = 1; assign HSMC_CLKOUT_N2 = 1; assign HSMC_CLKOUT_P1 = 1; assign HSMC_CLKOUT_P2 = 1; assign HSMC_CLKOUT0 = 1; - Altera_Forum
I have followed your steps for creating a project exactly and found that a lot of pins do change, but not trough the full range. For example HSMC_RX_D_n16 Switches between 1.6 and 2.6 volts. Maybe this is something in Quartus? I use Quartus II 64-Bit Version 15.0.0 Build 145 04/22/2015 SJ Web Edition, no patches installed. I run this on a Windows 8.1 system.
- Altera_Forum
Does anyone have an idea on how to fix this?
- Altera_Forum
Hi there,
Sorry for my late reply. I'll download your project and take some measurements to see how it goes. Thanks, David from Terasic - Altera_Forum
I have done some measurements myself and have sent them to Terasic. They told me it might be damage to the IO of the FPGA. It might be an incorrect IO setting, but that was discussed before and is, for me, not the case. They think the latter more likely and they suggest I don't use the pins.
Attatched you'll find my measurements from all IO pins. - Altera_Forum
Hi there,
I went through the mail and discussed with my colleague from the technical support team. It seems there's misunderstanding here, as your measurements were wrongly recognized as the result based on our default code instead of the new voltage test.qar that you uploaded. I've asked my colleague to try your project and compare it with a blank project generated by the system builder but loaded with your code. I'll post up the result here when it's done. Thanks, David from Terasic
