Jump to Content
Register Log in

RISCY BUSINESS
Blog
Forums
Episode Guide
twitter
We are currently in the process of converting the website to the new design. Some pages, like this one, are still broken. We appreciate your patience.
RISCY BUSINESS»Episode Guide
Studying GPIO & The Config String
References ▼
ISO/​IEC 9899:201x
[1]0:08
RISC-V
Draft Privileged ISA Specification v1.9.1
[2]8:44[6]29:47[8]43:41
SiFive Developers
Platform Reference Manual
[3]15:59[10]51:13[11]56:57
SiFive Developers
Freedom E310-G000 Manual
[4]17:24[5]27:09
Embedded Linux Wiki
Device Tree Usage
[7]38:12
SiFive Developers
E3 Coreplex Manual
[9]45:18
Filter mode:
Topics
hardware
(null topic)
Media
🗪Chat Comment
🖮Programming🟉
📖Research
🖌Whiteboard
🎭
🏟
🔗
Link to: current timestamp
Credits
Host
Neo Ar
Indexer
Matt Mascarenhas
?
?

Keyboard Navigation

Global Keys

[, < / ], > Jump to previous / next episode
W, K, P / S, J, N Jump to previous / next marker
t / T Toggle theatre / SUPERtheatre mode
V Revert filter to original state Y Select link (requires manual Ctrl-c)

Menu toggling

q Quotes r References f Filter y Link c Credits

In-Menu Movement

a
w
s
d
h j k l
←
↑
↓
→

Quotes and References Menus

Enter Jump to timecode

Quotes, References and Credits Menus

o Open URL (in new tab)

Filter Menu

x, Space Toggle category and focus next
X, ShiftSpace Toggle category and focus previous
v Invert topics / media as per focus

Filter and Link Menus

z Toggle filter / linking mode

Credits Menu

Enter Open URL (in new tab)
0:08Recap some off-stream work looking for the definition of __start()1
0:08Recap some off-stream work looking for the definition of __start()1
0:08Recap some off-stream work looking for the definition of __start()1
1:38Recap what we discovered about handle_m_time_interrupt() last time
📖
1:38Recap what we discovered about handle_m_time_interrupt() last time
📖
1:38Recap what we discovered about handle_m_time_interrupt() last time
📖
3:59TODO: Dive into __start + entry.S
🖌
3:59TODO: Dive into __start + entry.S
🖌
3:59TODO: Dive into __start + entry.S
🖌
5:05Set the stage for the day
5:05Set the stage for the day
5:05Set the stage for the day
6:13hossein1387 I had a look at link.lds (located at freedom-e-sdk/bsp/env/freedom-e300-hifive1 which provides stack size and other stuff) but it does call _start
🗪
6:13hossein1387 I had a look at link.lds (located at freedom-e-sdk/bsp/env/freedom-e300-hifive1 which provides stack size and other stuff) but it does call _start
🗪
6:13hossein1387 I had a look at link.lds (located at freedom-e-sdk/bsp/env/freedom-e300-hifive1 which provides stack size and other stuff) but it does call _start
🗪
6:54Consult link.lds
📖
6:54Consult link.lds
📖
6:54Consult link.lds
📖
8:44Come to understand handle_m_ext_interrupt()2
📖
8:44Come to understand handle_m_ext_interrupt()2
📖
8:44Come to understand handle_m_ext_interrupt()2
📖
15:59Research the GPIO3
📖
15:59Research the GPIO3
📖
15:59Research the GPIO3
📖
17:24Consult the GPIO pin layout4
📖
17:24Consult the GPIO pin layout4
📖
17:24Consult the GPIO pin layout4
📖
19:31Determine to understand the GPIO_REG macro
📖
19:31Determine to understand the GPIO_REG macro
📖
19:31Determine to understand the GPIO_REG macro
📖
21:37Point out the GPIO pins on the HiFive1
21:37Point out the GPIO pins on the HiFive1
21:37Point out the GPIO pins on the HiFive1
23:10Continue reading env/hifive1.h
📖
23:10Continue reading env/hifive1.h
📖
23:10Continue reading env/hifive1.h
📖
25:05Find the GPIO_REG() and _REG32() macros in env/freedom-e300-hifive1/platform.h
📖
25:05Find the GPIO_REG() and _REG32() macros in env/freedom-e300-hifive1/platform.h
📖
25:05Find the GPIO_REG() and _REG32() macros in env/freedom-e300-hifive1/platform.h
📖
27:09Read about the General Purpose Input/Output Controller (GPIO)5
📖
27:09Read about the General Purpose Input/Output Controller (GPIO)5
📖
27:09Read about the General Purpose Input/Output Controller (GPIO)5
📖
29:47Read the Machine Configuration Description6
📖
29:47Read the Machine Configuration Description6
📖
29:47Read the Machine Configuration Description6
📖
37:28hossein1387 From what I know, device tree is the way to tell Linux / OS what hardware we are using
🗪
37:28hossein1387 From what I know, device tree is the way to tell Linux / OS what hardware we are using
🗪
37:28hossein1387 From what I know, device tree is the way to tell Linux / OS what hardware we are using
🗪
38:12Read about Device Tree7
📖
38:12Read about Device Tree7
📖
38:12Read about Device Tree7
📖
43:41Continue reading about the Configuration String8
📖
43:41Continue reading about the Configuration String8
📖
43:41Continue reading about the Configuration String8
📖
45:18Consult the table detailing the overall memory map of the E3 Coreplex9
45:18Consult the table detailing the overall memory map of the E3 Coreplex9
45:18Consult the table detailing the overall memory map of the E3 Coreplex9
45:55Enable print_instructions() to print the information following the configuration string address
45:55Enable print_instructions() to print the information following the configuration string address
45:55Enable print_instructions() to print the information following the configuration string address
51:13Continue studying the GPIO10
📖
51:13Continue studying the GPIO10
📖
51:13Continue studying the GPIO10
📖
54:21Using XOR to invert
🖌
54:21Using XOR to invert
🖌
54:21Using XOR to invert
🖌
56:57Briefly consult the diagram detailing the structure of a single GPIO Pin with Control Registers before reading on about the GPIO11
📖
56:57Briefly consult the diagram detailing the structure of a single GPIO Pin with Control Registers before reading on about the GPIO11
📖
56:57Briefly consult the diagram detailing the structure of a single GPIO Pin with Control Registers before reading on about the GPIO11
📖
1:01:56GPIO
🖌
1:01:56GPIO
🖌
1:01:56GPIO
🖌
1:03:52We are out of time for today
1:03:52We are out of time for today
1:03:52We are out of time for today
1:05:32hossein1387 I tried to print the config
🗪
1:05:32hossein1387 I tried to print the config
🗪
1:05:32hossein1387 I tried to print the config
🗪
1:05:53hossein1387 It didn't work out
🗪
1:05:53hossein1387 It didn't work out
🗪
1:05:53hossein1387 It didn't work out
🗪
1:06:33hossein1387 It's all garbage
🗪
1:06:33hossein1387 It's all garbage
🗪
1:06:33hossein1387 It's all garbage
🗪
1:07:01hossein1387 { model = "SiFive,FE310G-0000-Z0"; compatible = "sifive,fe300"; /include/ 0x20004;};
🗪
1:07:01hossein1387 { model = "SiFive,FE310G-0000-Z0"; compatible = "sifive,fe300"; /include/ 0x20004;};
🗪
1:07:01hossein1387 { model = "SiFive,FE310G-0000-Z0"; compatible = "sifive,fe300"; /include/ 0x20004;};
🗪
1:08:42hossein1387 Can you also try? I want to know if there is a serial number or something
🗪
1:08:42hossein1387 Can you also try? I want to know if there is a serial number or something
🗪
1:08:42hossein1387 Can you also try? I want to know if there is a serial number or something
🗪
1:09:11Wind it down
1:09:11Wind it down
1:09:11Wind it down