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RISCY BUSINESS
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RISCY BUSINESS»Episode Guide
Reading about GPIO
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See what else Andrew & Yunsup said about their experience with RISC-V in an interview w/​ @miotatsu: https:/​/​forums.sifive.com/​t/​andrew-yunsup-interview/​413
[1]0:07
SiFive Forums
Lots of Questions… (RISCY BUSINESS Day 21)
[2]0:22[5]24:57[10]34:42
SiFive Forums
Does anyone else have problems with output?
[3]1:31[13]47:02
C++ reference
Numeric limits
[4]14:08
YouTube
RISCY BUSINESS - Day 12: Ripple Carry Adders & Two's Complement
[6]27:01
SiFive Developers
SiFive HiFive1 Getting Started Guide
[7]29:18
SiFive Developers
Platform Reference Manual
[8]30:32[11]41:15[14]51:11
[16]57:05
SiFive Developers
E3 Coreplex Manual
[9]31:30
Wikipedia
Interrupt
[12]47:02
StackExchange
What is a pull up resistor? What does it do? And why is it needed?
[15]54:41
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0:07Plug SiFive's shout-out of the interview with Andrew and Yunsup1
0:07Plug SiFive's shout-out of the interview with Andrew and Yunsup1
0:07Plug SiFive's shout-out of the interview with Andrew and Yunsup1
0:22Consult the forums for Megan's advice on finding the OTP2
📖
0:22Consult the forums for Megan's advice on finding the OTP2
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0:22Consult the forums for Megan's advice on finding the OTP2
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1:31Consult the forums for Megan's advice on enabling the HiFive1 to reliably start our programs3
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1:31Consult the forums for Megan's advice on enabling the HiFive1 to reliably start our programs3
📖
1:31Consult the forums for Megan's advice on enabling the HiFive1 to reliably start our programs3
📖
4:29Open our files
4:29Open our files
4:29Open our files
8:42Enable uart_init() to perform a busy loop
8:42Enable uart_init() to perform a busy loop
8:42Enable uart_init() to perform a busy loop
13:39Run our program to see similarly sketchy outputting behaviour
🏃
13:39Run our program to see similarly sketchy outputting behaviour
🏃
13:39Run our program to see similarly sketchy outputting behaviour
🏃
14:08Enable uart_init() to loop over INT_MAX4
14:08Enable uart_init() to loop over INT_MAX4
14:08Enable uart_init() to loop over INT_MAX4
17:18Run our program, see no blinking lights and wonder why
🏃
17:18Run our program, see no blinking lights and wonder why
🏃
17:18Run our program, see no blinking lights and wonder why
🏃
20:31See the lights, the let the program run for a little bit
🏃
20:31See the lights, the let the program run for a little bit
🏃
20:31See the lights, the let the program run for a little bit
🏃
21:28Try looping over INT_MAX on the dev machine
21:28Try looping over INT_MAX on the dev machine
21:28Try looping over INT_MAX on the dev machine
22:21Run our test and estimate that it took five seconds
🏃
22:21Run our test and estimate that it took five seconds
🏃
22:21Run our test and estimate that it took five seconds
🏃
22:56See the properly printed output of print_instructions()
🏃
22:56See the properly printed output of print_instructions()
🏃
22:56See the properly printed output of print_instructions()
🏃
23:05Try to make uart_init() loop over a smaller number
23:05Try to make uart_init() loop over a smaller number
23:05Try to make uart_init() loop over a smaller number
24:14Run our program and see that that worked perfectly
🏃
24:14Run our program and see that that worked perfectly
🏃
24:14Run our program and see that that worked perfectly
🏃
24:57Enable print_instructions() to print out the data at 0x21FE45
24:57Enable print_instructions() to print out the data at 0x21FE45
24:57Enable print_instructions() to print out the data at 0x21FE45
26:00popcorn0x90 0x7FFF. I thought it would be 0xFFFF
🗪
26:00popcorn0x90 0x7FFF. I thought it would be 0xFFFF
🗪
26:00popcorn0x90 0x7FFF. I thought it would be 0xFFFF
🗪
27:01Self-plug the episode on ripple carry adders6
27:01Self-plug the episode on ripple carry adders6
27:01Self-plug the episode on ripple carry adders6
27:50Continue with print_instructions()
27:50Continue with print_instructions()
27:50Continue with print_instructions()
28:22Run our program and see a potentially valid Unix timestamp
🏃
28:22Run our program and see a potentially valid Unix timestamp
🏃
28:22Run our program and see a potentially valid Unix timestamp
🏃
29:18Note that the OTP content locations are offsets7
📖
29:18Note that the OTP content locations are offsets7
📖
29:18Note that the OTP content locations are offsets7
📖
30:32Consult the Platform Reference Manual on the E300 Platform Memory Map8
📖
30:32Consult the Platform Reference Manual on the E300 Platform Memory Map8
📖
30:32Consult the Platform Reference Manual on the E300 Platform Memory Map8
📖
31:30Consult the E3 Coreplex Memory Map table for the address of the OTP read port9
📖
31:30Consult the E3 Coreplex Memory Map table for the address of the OTP read port9
📖
31:30Consult the E3 Coreplex Memory Map table for the address of the OTP read port9
📖
32:49miblo Well, it appears to be 0x7FFFFFFF or 1 << 31 - 1
🗪
32:49miblo Well, it appears to be 0x7FFFFFFF or 1 << 31 - 1
🗪
32:49miblo Well, it appears to be 0x7FFFFFFF or 1 << 31 - 1
🗪
33:25Recap the intuition on two's complement, that you count with zeros
33:25Recap the intuition on two's complement, that you count with zeros
33:25Recap the intuition on two's complement, that you count with zeros
34:42Report the value at 0x21FE4 in the forums10
34:42Report the value at 0x21FE4 in the forums10
34:42Report the value at 0x21FE4 in the forums10
37:06Request for viewers' board ID values at 0x21FE4
37:06Request for viewers' board ID values at 0x21FE4
37:06Request for viewers' board ID values at 0x21FE4
38:11miblo Yeah, I don't have the SDK installed yet, so I'll have to report back
🗪
38:11miblo Yeah, I don't have the SDK installed yet, so I'll have to report back
🗪
38:11miblo Yeah, I don't have the SDK installed yet, so I'll have to report back
🗪
38:32Scan quickly through the manuals looking for GPIO documentation
38:32Scan quickly through the manuals looking for GPIO documentation
38:32Scan quickly through the manuals looking for GPIO documentation
41:15Read about General Purpose Input/Output Controller (GPIO) in the Platform Reference Manual11
📖
41:15Read about General Purpose Input/Output Controller (GPIO) in the Platform Reference Manual11
📖
41:15Read about General Purpose Input/Output Controller (GPIO) in the Platform Reference Manual11
📖
47:02Read about level-triggered and edge-trigger interrupts on Wikipedia12 in conjunction with Megan's post about how the UART works13
📖
47:02Read about level-triggered and edge-trigger interrupts on Wikipedia12 in conjunction with Megan's post about how the UART works13
📖
47:02Read about level-triggered and edge-trigger interrupts on Wikipedia12 in conjunction with Megan's post about how the UART works13
📖
51:11Continue reading about the GPIO's Interrupts in the Platform Reference Manual14
📖
51:11Continue reading about the GPIO's Interrupts in the Platform Reference Manual14
📖
51:11Continue reading about the GPIO's Interrupts in the Platform Reference Manual14
📖
54:41Research GPIO pull-up15
📖
54:41Research GPIO pull-up15
📖
54:41Research GPIO pull-up15
📖
57:05Continue reading about Internal Pull-Ups and the remaining information about Interrupts in the Platform Reference Manual16
📖
57:05Continue reading about Internal Pull-Ups and the remaining information about Interrupts in the Platform Reference Manual16
📖
57:05Continue reading about Internal Pull-Ups and the remaining information about Interrupts in the Platform Reference Manual16
📖
1:00:27We are out time for today
1:00:27We are out time for today
1:00:27We are out time for today